CN220050716U - Bolt fillet rolling device - Google Patents
Bolt fillet rolling device Download PDFInfo
- Publication number
- CN220050716U CN220050716U CN202321382875.3U CN202321382875U CN220050716U CN 220050716 U CN220050716 U CN 220050716U CN 202321382875 U CN202321382875 U CN 202321382875U CN 220050716 U CN220050716 U CN 220050716U
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- Prior art keywords
- bolt
- material hole
- steel balls
- block
- channel
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- 238000005096 rolling process Methods 0.000 title claims abstract description 27
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 56
- 239000010959 steel Substances 0.000 claims abstract description 56
- 239000000463 material Substances 0.000 claims abstract description 34
- 239000002184 metal Substances 0.000 claims abstract description 4
- 229910052751 metal Inorganic materials 0.000 claims abstract description 4
- 238000003825 pressing Methods 0.000 claims description 22
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 230000002787 reinforcement Effects 0.000 abstract description 6
- 238000005728 strengthening Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000011365 complex material Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
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- Connection Of Plates (AREA)
Abstract
The utility model discloses a bolt fillet rolling device, which comprises a block body made of metal, wherein a material hole matched with a bolt is formed in the center of the block body, channels communicated with the material hole are formed in two sides of the block body, steel balls for rolling bolt fillets are arranged in the channels and the material holes, the device meets the requirement of low-cost fillet reinforcement of the bolt under the condition of low yield, and the device is low in manufacturing cost, low in use cost, simple in structure and easy to manufacture, and the fillets of the bolt are reinforced by the steel balls.
Description
Technical Field
The utility model relates to the technical field of bolt processing, in particular to a bolt fillet rolling device.
Background
With the vigorous development of industries such as aviation, aerospace, high-speed trains, high-grade passenger cars and the like, the requirements of various fields on high-strength bolts are higher and higher. The large-size bolt is mostly formed by forging, and the joint of the bolt head and the bolt rod is a stress concentration point of the bolt and is one of dangerous sections with fatigue fracture. The bolts used in special occasions have higher performance requirements, in particular fatigue resistance, not only require the external threads of the bolts to be roll-formed after heat treatment, but also require stress concentration areas of the bolts to be roll-reinforced. The bolt fillet rolling strengthening can delay the generation of cracks in the stress concentration area, reduce the influence of the stress concentration area on the fatigue performance, and greatly improve the service life of the bolt.
The fillet rolling strengthening is a technological method for forming strengthening by rolling or extruding excessive fillets of a part to be processed by using rollers under the action of certain pressure so as to enable the part to be plastically deformed. The roller is under the action of rolling force, the surface layer of the round angle generates plastic deformation and residual stress. The bolt mainly bears the action of tensile stress in the use process, and the generated residual compressive stress can partially offset or completely offset the influence of the tensile stress, so that the fatigue strength is improved. Rolling can also compact the metal structure, forming a high-hardness compact layer at the fillets, which can improve the mechanical strength and fatigue strength of the bolt.
The prior bolt fillet rolling equipment mostly adopts a roller rolling mode, such as a fastener rolling equipment and a rolling method in patent CN202310064180, which uses rollers to roll fillets, uses a plurality of cylinders and sensors to roll fillets of bolts, has a complex equipment structure, and is suitable for manufacturing bolts with high added value and carrying out batch production. For less demanding bolts or less productive bolts, simple equipment is often required for the production process.
Disclosure of Invention
The utility model aims at the defects in the prior art, and provides a bolt fillet rolling device which achieves the purpose of reinforcing the bolt fillet by rolling the bolt fillet through a simple device and structure and using steel balls.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
the utility model provides a bolt fillet rolling press device, the device includes the block of metal material, the center of block be equipped with bolt complex material hole, the both sides of block be equipped with the communicating passageway in material hole, the steel ball that is used for rolling press bolt fillet is equipped with in passageway and the material hole.
Preferably, a pressing piece for pushing the steel balls to move downwards is arranged in the material hole.
Preferably, the surface of the channel is smooth, the diameter of the channel is larger than that of the steel ball, and the corner of the channel is a round corner.
Preferably, the block comprises a first block and a second block which are plugged together.
Preferably, the diameter of the steel ball is smaller than or equal to the diameter of the round angle of the reinforced bolt.
Preferably, the first block is provided with a plug, and the second block is provided with a groove matched with the plug.
Preferably, a hook hole is arranged in the center of the pressing sheet.
Compared with the prior art, the utility model has the beneficial effects that:
1. the device designed by the utility model meets the requirement of realizing low-cost fillet reinforcement of the bolt under the condition of low yield, has low manufacturing cost, low use cost, simple structure and easy manufacture, and uses the steel balls to reinforce the fillets of the bolt.
2. The device designed by the utility model can strengthen the round angle of bolts with various specifications by adjusting the thickness of the pressing piece and increasing and decreasing the number of steel balls.
3. Besides the round angle reinforcement of the bolts, the device designed by the utility model can be expanded to the round angle reinforcement of other parts, such as the reinforcement of the bearing round angle.
4. According to the utility model, through the design of the plug-in structure, the device is divided into two parts, so that the processing difficulty and the processing cost of the device in the manufacturing process are reduced.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic diagram of the structure of the present utility model;
FIG. 3 is a schematic cross-sectional view of the present utility model;
in the figure: 1-material hole, 2-channel, 3-bolt, 4-steel ball, 5-preforming, 6-block, 601-first block, 602-second block, 7-collude hole, 8-plug, 9-recess.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1-3, a bolt fillet rolling device is provided, the main body of the device is a block 6 made of metal, the block 6 is composed of a first block 601 and a second block 602, the two parts are combined together in an inserting manner, a plug 8 and a groove 9 are respectively arranged on the first block 601 and the second block 602, and when in use, the plug 8 is inserted into the groove 9, so that the first block 601 and the second block 602 are combined into one block. The block 1 is made of metal materials with higher strength, such as hard alloy steel, stainless steel and the like. The middle of the block body 1 is provided with a material hole 1 and a channel 2 by machining, so that the two parts of the block body 1 are respectively provided with a half of the material hole 1 and a half of the channel 2 for convenient machining, and the two parts of the block body 1 are combined together to form a complete material hole 1 and a complete material channel 2.
The steel balls 4 are arranged in the material hole 1 and the channel 2, the diameter of the channel 2 is slightly larger than that of the steel balls 4, the steel balls 4 pass through the channel 2 singly, gaps between the steel balls 4 and the channel 2 are small, the steel balls 4 are not easy to shake in the channel 2, the tail ends of the steel balls 4 in the channel 2 can be aligned with the round corners of the bolts 3, and the position deviation is not easy to occur.
The diameter of the material hole 1 is larger than that of the screw rod of the bolt 3, the screw rod of the bolt 3 is inserted into the material hole 1, after the screw rod is inserted, the lower surface of the bolt 3 contacts with the steel ball 4, the steel ball 4 is extruded, the steel ball 4 is pressed into the channel 2 after being extruded, and the steel ball 4 at the tail end of the channel 2 can leak out of the channel 2 to contact with the round angle of the bolt 3. The number of the steel balls 4 in the material hole 1 can be increased or decreased according to the length of the bolt 3, so that the lower surface of the bolt 3 can effectively squeeze the steel balls 4.
In order for the steel balls 4 to be able to form an effective compression against the rounded corners of the bolt 3, the diameter of the steel balls 4 must be equal to or smaller than the diameter of the rounded corners of the bolt 3. If the diameter of the steel ball 4 is larger than the diameter of the round angle of the bolt 3, the steel ball 4 cannot form effective surface contact with the round angle of the bolt 3, and the round angle cannot be reinforced. Only when the diameter of the steel ball 4 is equal to or smaller than the diameter of the round corner of the bolt 3, the steel ball 4 can be brought into effective contact with the face of the round corner of the bolt 3.
In order to increase the pressing force of the bolt 3 to the steel ball 4 in the material hole 1, a pressing piece 5 is arranged in the material hole 1. The diameter of the pressing piece 5 is slightly smaller than that of the material hole 1, the surface of the pressing piece 5 is smooth, and the pressing piece can slide up and down in the material hole 1. After the pressing piece 5 is added, the bolt 3 presses the pressing piece 5 in the material hole 1 first, and then the pressing piece 5 presses the steel ball 4 downwards. When the diameter of the bolt 3 is smaller and the gap between the screw rod of the bolt 3 and the inner wall of the material hole 1 is larger, steel balls 4 possibly are clamped in the gap in the downward pressing process of the bolt 3, so that the downward pressing of the bolt 3 is prevented, and the strengthening effect of the round corners of the bolt 3 is affected. After the pressing sheet 5 is added, the phenomenon that the steel balls 4 are clamped in the gaps can not occur because the gap between the pressing sheet 5 and the inner wall of the material hole 1 is smaller, and a good round angle strengthening effect can be achieved when the diameter of the screw rod of the bolt 3 is smaller. The pressing piece 5 has various thickness dimensions, and is selected according to the length of the bolt 3, and the steel ball 4 emerging from the channel 2 is in effective contact with the round angle of the bolt 3 by adjusting the thickness of the pressing piece 5.
The center of the pressing sheet 5 is provided with a hooking hole 7, the hooking hole 7 is a through hole, and objects such as thin iron wires or needles can be inserted into the hooking hole 7 to hook the pressing sheet 5 out of the material hole 1, so that the steel balls 4 in the material hole 1 can be replaced or increased or decreased conveniently.
The steel balls 4 are quenched steel balls. The surface hardness is high. In order to increase the service life of the steel balls 4 and ensure the strengthening effect of the round corners of the bolts 3, the hardness of the steel balls 4 is larger than that of the bolts 3.
In order to prevent the steel balls 4 from being blocked in the channel 2 or the material hole 1, the inner walls of the channel 2 and the material hole 1 are polished to be smooth, and round corner treatment is performed at the corner of the channel 2 or the joint of the channel 2 and the material hole 1, so that the flow of the steel balls 4 is smoother.
When in use, the plug 8 is inserted into the groove 9, so that the two parts form a finished block 6, a proper amount of steel balls 4 are filled in the material hole 1, and then the pressing sheet 5 is put in. The bolt 3 is placed in the material hole 1, the bolt 3 is pressed downwards, the steel ball 4 in the material hole 1 is extruded downwards and then enters the channel 2, and then the steel ball moves upwards in the channel 2 until reaching the tail end of the channel 2. The steel balls 4 leak out from the tail end of the channel 2, and the steel balls 4 cannot fall out of the channel 2 under the blocking of the bolt 3 at the joint of the steel balls with the round corners of the bolt 3. The weight is placed on the bolt 3, and the bolt 3 is pressed downward, or the bolt 3 may be pressed downward by a mechanical device such as a press or a cylinder. So that sufficient pressure is formed between the round corners of the bolts 3 and the steel balls 4. The bolt 3 is rotated by using tools such as pliers, so that the whole round angle of the bolt 3 is extruded by the steel balls 4, lubricating grease can be smeared on the surfaces of the steel balls 4 in order to increase the rotation between the bolt 3 and the steel balls 4, and the friction force between the bolt 3 and the steel balls 4 is reduced. After the round corners of the bolts 3 are rolled by the steel balls 4, the pressure is removed, and the bolts 3 are taken out. At this time, the fillet reinforcement of the bolt 3 is completed.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present utility model without departing from the spirit or scope of the utility model. Thus, it is intended that the present utility model also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (7)
1. A bolt fillet rolling device is characterized in that: the device comprises a block body made of metal, a material hole matched with the bolt is formed in the center of the block body, channels communicated with the material hole are formed in two sides of the block body, and steel balls for rolling round corners of the bolt are arranged in the channels and the material hole.
2. A bolt fillet rolling apparatus as claimed in claim 1 wherein: and a pressing sheet for pushing the steel balls to move downwards is arranged in the material hole.
3. A bolt fillet rolling apparatus as claimed in claim 1 wherein: the surface of the channel is smooth, the diameter of the channel is larger than that of the steel ball, and the corner of the channel is a round corner.
4. A bolt fillet rolling apparatus as claimed in claim 1 wherein: the block comprises a first block body and a second block body which are spliced together.
5. A bolt fillet rolling apparatus as claimed in claim 1 wherein: the diameter of the steel ball is smaller than or equal to the diameter of the round angle of the reinforced bolt.
6. A bolt fillet rolling apparatus as in claim 4 wherein: the first block is provided with a plug, and the second block is provided with a groove matched with the plug.
7. A bolt fillet rolling apparatus as claimed in claim 2 wherein: the center of the pressing piece is provided with a hook hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321382875.3U CN220050716U (en) | 2023-05-31 | 2023-05-31 | Bolt fillet rolling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321382875.3U CN220050716U (en) | 2023-05-31 | 2023-05-31 | Bolt fillet rolling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220050716U true CN220050716U (en) | 2023-11-21 |
Family
ID=88788003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321382875.3U Active CN220050716U (en) | 2023-05-31 | 2023-05-31 | Bolt fillet rolling device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220050716U (en) |
-
2023
- 2023-05-31 CN CN202321382875.3U patent/CN220050716U/en active Active
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