A positioning tool with adjustable diameter for bolt tapping

Abstract

The present invention provides a diameter-adjustable positioning tool for bolt tapping, which belongs to the technical field of bolt tapping. It includes a frame and a screw head positioning device and a tapping device installed on the frame. The screw head positioning device is used to determine the position and size information of the screw head of the bolt, and the tapping device is used to tap the bolt. The screw head positioning device includes a bottom adjusting component, a screw head placing plate and a movable jacking component. The bottom adjusting component is used to move and adjust the screw head placing plate in the horizontal plane, and the movable jacking component is used to clamp the bolt placed on the screw head placing plate. By setting the bottom adjusting component, the screw head placing plate and the movable jacking component, the position of the bolt is adjusted, the screw head is fixed, and the stud is supported, so that the entire tapping process can adaptively adjust the position according to bolts of different diameters to achieve more accurate tapping, and the screw head and the stud are stabilized during the tapping process to achieve more stable tapping.

Description

Technical Field

[0001] The present invention belongs to the technical field of bolt tapping, and more specifically, relates to a positioning tool with adjustable diameter for bolt tapping. Background Art

[0002] Bolts are mechanical parts, cylindrical threaded fasteners equipped with nuts. They are a type of fastener consisting of a screw head and a screw rod. They need to be matched with nuts and are used to fasten and connect two parts with through holes. This type of connection is called bolt connection. If the nut is unscrewed from the bolt, the two parts can be separated. Therefore, bolt connection is a detachable connection. In the production process of bolts, tapping is an indispensable process. In the tapping process, tapping equipment is usually used for processing. Bolts of different diameters need to adjust the position of the tapping device or change the installation position of the bolt when they are fixed for processing. If the position adjustment is not accurate enough, it will lead to defects such as tapping failure.

[0003] A material moving and positioning device for a desktop tapping machine with patent number CN202120312222.2 provides a positioning method for tapping bolts of different models. However, the positioning method of this method is rough and has large errors, and is not perfectly positioned according to the model and size of the bolt. Summary of the Invention

[0004] 1. Technical problem to be solved by the invention

[0005] The purpose of the present invention is to solve the defects of existing tapping equipment, such as inaccurate positioning when tapping bolts of different types and unstable tapping of bolts of different lengths.

[0006] 2. Technical solution

[0007] In order to achieve the above object, the technical solution provided by the present invention is:

[0008] The present invention provides a positioning tool with adjustable diameter for bolt tapping, including a frame and a screw head positioning device and a tapping device installed on the frame. The screw head positioning device is used to determine the position and size information of the screw head of the bolt to facilitate subsequent tapping operations. The tapping device is used to tap the bolt. The screw head positioning device includes a bottom adjustment component, a screw head placement plate and a movable jacking component. The bottom adjustment component is used to move and adjust the screw head placement plate in the horizontal plane. The movable jacking component is used to clamp the bolt placed on the screw head placement plate.

[0009] Preferably, the bottom adjustment component includes a screw slider mechanism 1 and a screw slider mechanism 2, wherein the screw slider mechanism 2 is installed as a whole on the slider of the screw slider mechanism 1, and the screw head placement plate is installed on the slider of the screw slider mechanism 2. The screw of the screw slider mechanism 1 and the screw of the screw slider mechanism 2 are perpendicular, and the screw head placement plate changes its position on the horizontal plane through the screw slider mechanism 1 and the screw slider mechanism 2. A light rod parallel to the internal screw of the screw slider mechanism 1 is provided on one side of the screw slider mechanism 1, and the light rod and the screw rod pass through the slider inside the screw slider mechanism 1 together and limit it.

[0010] Preferably, a shallow groove is provided on the screw head placement plate, and the shallow groove includes two planar inner walls at an angle of 120°. Two of the outer walls of the screw head of the bolt are in contact with the two planar inner walls in the shallow groove. A pressure plate for pressing the outer walls of the screw head and an electric push rod for controlling the movement of the pressure plate are provided in the shallow groove. The pressure plate is parallel to a planar inner wall in the shallow groove.

[0011] Preferably, the movable jacking assembly includes a concave part and a convex part for clamping the stud, the center planes of the concave part and the convex part are coplanar, the concave part and the convex part are both provided with a cylinder to drive them, a horizontal through groove is provided in the concave part, and the convex part is driven by the cylinder to move in the through groove.

[0012] Preferably, the concave part and the convex part each include two intersecting active surfaces, the angles between the two active surfaces of the concave part and the convex part are the same, and when the vertices of the two intersecting active surfaces of the concave part and the convex part coincide, the coincident point is located directly below the tapping device.

[0013] Preferably, the tapping device includes a rotating shaft, a tapping plate and a mounting frame. The tapping plate is installed on the rotating shaft through the mounting frame. The tapping plate is provided with tapping screw holes for tapping. Different tapping plates are provided with tapping screw holes of different sizes. After the different tapping plates are installed on the mounting frame, their tapping screw holes are coaxial.

[0014] Preferably, the screw slider mechanism one and the screw slider mechanism two are electrically connected to the controller, the controller is connected to the electric push rod, and after the displacement of the output shaft of the electric push rod is generated, the electrical signal of the displacement will be transmitted to the controller, and the controller controls the number of rotations and rotation direction of the motors in the screw slider mechanism one and the screw slider mechanism two according to the electrical signal.

[0015] Preferably, the screw head placement plate is composed of a flat plate and a limiting plate, the flat plate is provided with a socket, the limiting plate is provided with a column for being inserted into the socket for connection, the plane inner wall is located on the limiting plate, the pressure plate is installed on the flat plate, and the limiting plate is composed of multiple thin plates of the same structure stacked together, the column is located on the top thin plate, and the remaining thin plates are provided with through holes coaxial with the socket.

[0016] Preferably, a fixed column for mounting the tapping device is provided on the frame, and the movable jacking assembly is mounted on the fixed column, and the movable jacking assembly can move up and down on the fixed column.

[0017] Preferably, the top surfaces of the concave member and the convex member are both inclined surfaces, and the inclined surfaces are used to receive the metal wire that falls off after tapping by the upper tapping device, and the metal wire slides down along the inclined surfaces.

[0018] 3. Beneficial effects

[0019] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0020] (1) The present invention provides a positioning tool with adjustable diameter for bolt tapping. By setting a bottom adjustment component, a screw head placement plate and a movable jacking component, the position of the bolt is adjusted, the screw head is fixed, and the stud is supported. The entire tapping process can be adaptively adjusted according to the position of bolts with different diameters, thereby achieving more accurate tapping. In addition, the screw head and the stud are stabilized during the tapping process, thereby achieving more stable tapping. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of a positioning tool with adjustable diameter for bolt tapping according to the present invention;

[0022] Figure 2 This is a structural schematic diagram of a screw head placement plate of a positioning tool with adjustable diameter for bolt tapping according to the present invention;

[0023] Figure 3 A schematic diagram of the movement of a plate of a positioning tool with adjustable diameter for bolt tapping according to the present invention;

[0024] Figure 4 A schematic diagram of a screw head mounting plate of a positioning tool with adjustable diameter for bolt tapping according to the present invention being used to mount bolts of different sizes;

[0025] Figure 5 This is a schematic structural diagram of a movable jacking assembly of a positioning tool with adjustable diameter for bolt tapping according to the present invention;

[0026] Figure 6 A schematic diagram of the clamping of a movable jacking assembly of a positioning tool with adjustable diameter for bolt tapping according to the present invention;

[0027] Figure 7 This is a schematic diagram of position adjustment of a positioning tool with adjustable diameter for bolt tapping according to the present invention;

[0028] Figure 8 This is a structural schematic diagram of a through-slot of a positioning tool with adjustable diameter for bolt tapping according to the present invention;.

[0029] Explanation of the numbers in the schematic diagram:

[0030] 100, rack; 110, fixing column;

[0031] 200, screw head positioning device; 210, bottom adjustment assembly; 211, screw slider mechanism 1; 212, screw slider mechanism 2; 220, screw head placement plate; 221, shallow groove; 222, flat inner wall; 223, pressure plate; 224, electric push rod; 225, flat plate; 226, limit plate; 230, movable jacking assembly; 231, concave member; 232, convex member; 233, cylinder; 234, through-slot;

[0032] 300, tapping device; 310, rotating shaft; 320, tapping plate; 330, mounting frame;

[0033] 400. Controller. DETAILED DESCRIPTION

[0034] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0035] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may also be an element in the middle; when an element is considered to be "connected to" another element, it may be directly connected to the other element or there may also be an element in the middle; the terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains; the terms used herein in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention; the term "and / or" used herein includes any and all combinations of one or more of the associated listed items.

[0037] Example 1

[0038] Refer to the attached Figures 1-8As shown, a positioning tool with adjustable diameter for bolt tapping in this embodiment includes a frame 100 and a screw head positioning device 200 and a tapping device 300 installed on the frame 100. The screw head positioning device 200 is used to determine the position and size information of the screw head of the bolt to facilitate subsequent tapping operations. The tapping device 300 is used to tap the bolt. The screw head positioning device 200 includes a bottom adjustment component 210, a screw head placement plate 220 and a movable jacking component 230. The bottom adjustment component 210 is used to adjust the horizontal movement of the screw head placement plate 220. The movable jacking component 230 is used to clamp the bolt placed on the screw head placement plate 220.

[0039] When tapping bolts, since bolts of different sizes have different diameters, and in order to prevent the bolts from shaking or rotating, the screw heads, i.e., the hexagonal side walls, are generally installed and fixed. Bolts of different diameters have screw heads of corresponding sizes. When the screw heads are fixed with the same structure, such as a structure with a certain angle, the stud itself cannot rotate. However, due to the difference in size, the center axis of the stud will be offset, resulting in the need to adjust the upper tapping device 300 for tapping, which can easily cause tapping deviation.

[0040] The structure of this design uses a screw head placement plate 220 to install and fix the screw head, and the bottom adjustment component 210 adjusts the displacement of the screw head placement plate 220, so that even if bolts of different sizes are installed, they can be synchronously adjusted to the bottom of the tapping device 300, achieving more precise positioning. In order to avoid adjustment deviation, the following design structure is adopted.

[0041] The bottom adjustment component 210 of this embodiment includes a screw slider mechanism 1 211 and a screw slider mechanism 212, wherein the screw slider mechanism 212 is integrally mounted on the slider of the screw slider mechanism 1 211, and the screw head placement plate 220 is mounted on the slider of the screw slider mechanism 212. The screw rod of the screw slider mechanism 1 211 and the screw rod of the screw slider mechanism 2 212 are perpendicular. The screw head placement plate 220 changes its position on the horizontal plane through the screw slider mechanism 1 211 and the screw slider mechanism 2 212. A light rod parallel to the internal screw rod of the screw slider mechanism 1 211 is provided on one side of the screw slider mechanism 1 211. The light rod and the screw rod pass through the slider in the screw slider mechanism 1 211 together and limit it.

[0042] In this embodiment, a shallow groove 221 is provided on the screw head placement plate 220, and the shallow groove 221 includes two planar inner walls 222 at an angle of 120°. Two outer side walls of the screw head of the bolt are in contact with the two planar inner walls 222 in the shallow groove 221. A pressure plate 223 for pressing the outer side walls of the screw head and an electric push rod 224 for controlling the movement of the pressure plate 223 are provided in the shallow groove 221. The pressure plate 223 is parallel to a planar inner wall 222 in the shallow groove 221.

[0043] In this embodiment, the screw slider mechanism 1 211 and the screw slider mechanism 2 212 are electrically connected to the controller 400, and the controller 400 is connected to the electric push rod 224. After the displacement of the output shaft of the electric push rod 224 is generated, the electrical signal of the displacement will be transmitted to the controller 400. The controller 400 controls the number of rotations and rotation direction of the motors in the screw slider mechanism 1 211 and the screw slider mechanism 2 212 according to the electrical signal.

[0044] As mentioned above, according to Figure 4 , it can be seen that when installing bolts of different diameters, the central axis thereof has a certain displacement in the horizontal plane. Since the sizes of the screw head and the stud of the bolt are standard, the diameter of the stud can be known by measuring the size of the screw head, and the offset can be further known according to the diameter, and then the screw slider mechanism 1 211 and the screw slider mechanism 2 212 can be controlled by the offset to call back. In the structure of this design, the electric push rod 224 pushes the pressure plate 223 to press the screw head, wherein the pressure plate 223 is parallel to one of the plane inner walls 222, so the distance between the pressure plate 223 and the opposite plane inner wall 222 reflects the size of the screw head, and further the distance is reflected by measuring the displacement of the electric push rod 224. Therefore, the displacement of the electric push rod 224 each time it works corresponds to a bolt of a certain size. Therefore, through the design scheme, accurate positioning is achieved, which will further make the subsequent tapping operation more accurate. Specifically, Figure 7 As described above, it is assumed that point A is directly below the tapping device 300, that is, the point that can be perfectly tapped. When a larger-sized bolt is installed, the center point of its stud is located at point B. At this time, the controller 400 controls the screw slider mechanism 1 211 and the screw slider mechanism 2 212 to move by the displacement amounts L1 and L2 shown in the figure, respectively, so that point B coincides with point A to achieve precise tapping. Vice versa, if point B is the perfect tapping point, a smaller bolt is installed, that is, moved from point A to point B, and the same principle applies.

[0045] The movable jacking assembly 230 of this embodiment includes a concave part 231 and a convex part 232 for clamping the stud. The center planes of the concave part 231 and the convex part 232 are coplanar. The concave part 231 and the convex part 232 are both provided with a cylinder 233 to drive them. A horizontal through groove 234 is provided in the concave part 231, and the convex part 232 is driven by the cylinder 233 to move in the through groove 234.

[0046] In this embodiment, the concave part 231 and the convex part 232 both include two intersecting active surfaces, and the angles between the two active surfaces of the concave part 231 and the convex part 232 are the same. When the vertices of the two intersecting active surfaces of the concave part 231 and the convex part 232 coincide, the overlapping point is located directly below the tapping device 300.

[0047] The movable jacking assembly 230 designed above uses the concave part 231 and the convex part 232 to clamp the stud for stability. The stud of a large-sized bolt is longer. If only the screw head is fixed, it will not be stable enough during further processing. Therefore, by fixing the stud with the concave part 231 and the convex part 232, the stability of the bolt can be better maintained, which facilitates the tapping operation.

[0048] The above-mentioned concave part 231 and convex part 232, wherein the convex part 232 is driven by the cylinder 233 to move in the through groove 234, and the concave part 231 limits the upper and lower positions of the convex part 232, so that when the convex part 232 is located in the concave part 231, it has high stability and will not slide, further ensuring the stability of the stud.

[0049] The tapping device 300 of this embodiment includes a rotating shaft 310, a tapping plate 320 and a mounting frame 330. The tapping plate 320 is mounted on the rotating shaft 310 through the mounting frame 330. The tapping plate 320 is provided with tapping screw holes for tapping. Different tapping plates 320 are provided with tapping screw holes of different sizes. After different tapping plates 320 are installed on the mounting frame 330, their tapping screw holes are coaxial.

[0050] The structure of this design requires tapping screw holes of different sizes for processing when tapping different bolts. Therefore, the structure of this design designs the tapping screw holes on the tapping plate 320. By replacing different tapping plates 320, the tapping plate 320 is installed on the mounting frame 330, and its tapping screw holes are coaxial, which eliminates the calibration process.

[0051] The screw head placement plate 220 of this embodiment is composed of a flat plate 225 and a limiting plate 226. The flat plate 225 is provided with a socket, and the limiting plate 226 is provided with a column for being inserted into the socket for connection. The planar inner wall 222 is located on the limiting plate 226, and the pressure plate 223 is installed on the flat plate 225. The limiting plate 226 is composed of multiple thin plates with the same structure stacked together. The column is located on the top thin plate, and the remaining thin plates are provided with through holes coaxial with the socket.

[0052] Bolts of different sizes have different screw head thicknesses. Therefore, in order to better fit the side walls of the screw head and maintain relatively better stability, it is best that the height of the planar inner wall 222 also changes with the thickness of the screw head. Therefore, the structure of this design changes the thickness by increasing or decreasing the number of thin plates, thereby achieving a more stable clamping bolt, making it more stable during processing.

[0053] The frame 100 of this embodiment is provided with a fixed column 110 for installing the tapping device 300, and the movable jacking assembly 230 is installed on the fixed column 110. The movable jacking assembly 230 can move up and down on the fixed column 110. By changing the position of the movable jacking assembly 230, the position of its action on the stud can be changed.

[0054] The top surfaces of the concave part 231 and the convex part 232 of this embodiment are both inclined surfaces, which are used to receive the metal wire that falls off after tapping from the tapping device 300 above. The metal wire slides along the inclined surface to prevent it from entering the shallow groove 221, causing instability of the subsequently installed bolts.

[0055] Working process:

[0056] The bolt to be tapped is placed on the screw head placement plate 220 so that the two surfaces of the bolt head are in contact with the plane inner wall 222. The electric push rod 224 works to push the pressure plate 223 to press the side wall of the screw head so that the bolt is stabilized on the screw head mounting plate. The electric push rod 224 provides the electrical signal of its working displacement to the controller 400. The controller 400 controls the operation of the screw slider mechanism 1 211 and the screw slider mechanism 2 212 so that the bolt is displaced to the bottom of the tapping device 300. The movable jacking assembly 230 works, the concave part 231 and the convex part 232 clamp the stud, and the tapping device 300 then works to tap it. The metal wire produced by tapping falls onto the top surface of the concave part 231 and the convex part 232 and finally slides off.

[0057] The above-mentioned embodiments only express a certain implementation method of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the patent scope of the present invention. It should be pointed out that for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent of the present invention shall be based on the attached claims.

Claims

1. A diameter-adjustable positioning tool for bolt tapping, characterized by: The invention comprises a frame (100) and a screw head positioning device (200) and a tapping device (300) installed on the frame (100), wherein the screw head positioning device (200) is used to determine the position and size information of the screw head of the bolt to facilitate subsequent tapping operations, and the tapping device (300) is used to perform tapping operations on the bolts. The screw head positioning device (200) comprises a bottom adjustment component (210), a screw head placement plate (220) and a movable jacking component (230), wherein the bottom adjustment component (210) is used to perform horizontal movement adjustment on the screw head placement plate (220), and the movable jacking component (230) is used to clamp the bolts placed on the screw head placement plate (220); The bottom adjustment component (210) includes a screw slider mechanism (211) and a screw slider mechanism (212), wherein the screw slider mechanism (212) is integrally mounted on the slider of the screw slider mechanism (211), and the screw head placement plate (220) is mounted on the slider of the screw slider mechanism (212). The screw rod of the screw slider mechanism (211) and the screw rod of the screw slider mechanism (212) are perpendicular to each other. The screw head placement plate (220) changes its position on the horizontal plane through the screw slider mechanism (211) and the screw slider mechanism (212). A light rod parallel to the screw rod inside the screw slider mechanism (211) is provided on one side of the screw slider mechanism (211), and the light rod and the screw rod pass through the slider inside the screw slider mechanism (211) together and limit it. The screw slider mechanism 1 (211) and the screw slider mechanism 2 (212) are electrically connected to a controller (400), and the controller (400) is connected to an electric push rod (224). After the displacement of the output shaft of the electric push rod (224) is generated, an electrical signal of the displacement is transmitted to the controller (400), and the controller (400) controls the number of rotations and the rotation direction of the motors in the screw slider mechanism 1 (211) and the screw slider mechanism 2 (212) according to the electrical signal.

2. The diameter-adjustable positioning tool for bolt tapping according to claim 1, characterized in that: A shallow groove (221) is provided on the screw head placement plate (220), and the shallow groove (221) includes two planar inner walls (222) at an angle of 120 degrees. Two outer side walls of the screw head of the bolt are in contact with the two planar inner walls (222) in the shallow groove (221). A pressing plate (223) for pressing the outer side walls of the screw head and an electric push rod (224) for controlling the movement of the pressing plate (223) are provided in the shallow groove (221). The pressing plate (223) is parallel to a planar inner wall (222) in the shallow groove (221).

3. The diameter-adjustable positioning tool for bolt tapping according to claim 1, characterized in that: The movable jacking assembly (230) includes a concave part (231) and a convex part (232) for clamping the stud, the center planes of the concave part (231) and the convex part (232) are coplanar, the concave part (231) and the convex part (232) are both provided with a cylinder (233) to drive them, a horizontal through groove (234) is provided in the concave part (231), and the convex part (232) is driven by the cylinder (233) to move in the through groove (234).

4. The diameter-adjustable positioning tool for bolt tapping according to claim 3, characterized in that: The concave part (231) and the convex part (232) each include two intersecting active surfaces, the included angles of the two active surfaces of the concave part (231) and the convex part (232) being the same, and when the vertices of the two intersecting active surfaces of the concave part (231) and the convex part (232) coincide, the coincident point is located directly below the tapping device (300).

5. The diameter-adjustable positioning tool for bolt tapping according to claim 1, characterized in that: The tapping device (300) comprises a rotating shaft (310), a tapping plate (320) and a mounting frame (330). The tapping plate (320) is mounted on the rotating shaft (310) via the mounting frame (330). The tapping plate (320) is provided with tapping screw holes for tapping. Different tapping plates (320) are provided with tapping screw holes of different sizes. After the different tapping plates (320) are mounted on the mounting frame (330), their tapping screw holes are coaxial.

6. The diameter-adjustable positioning tool for bolt tapping according to claim 2, characterized in that: The screw head placement plate (220) is composed of a flat plate (225) and a limiting plate (226); the flat plate (225) is provided with a socket; the limiting plate (226) is provided with a plug for being inserted into the socket for connection; the planar inner wall (222) is located on the limiting plate (226); the pressing plate (223) is mounted on the flat plate (225); the limiting plate (226) is composed of a plurality of thin plates with the same structure stacked together; the plug is located on the topmost thin plate; and the remaining thin plates are provided with through holes coaxial with the socket.

7. The diameter-adjustable positioning tool for bolt tapping according to claim 1, characterized in that: The frame (100) is provided with a fixed column (110) for installing a tapping device (300), and the movable jacking assembly (230) is installed on the fixed column (110). The movable jacking assembly (230) can move up and down on the fixed column (110).

8. The diameter-adjustable positioning tool for bolt tapping according to claim 4, characterized in that: The top surfaces of the concave part (231) and the convex part (232) are both inclined surfaces, and the inclined surfaces are used to receive the metal wire that falls off after tapping from the upper tapping device (300), and the metal wire slides down along the inclined surfaces.

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