A device for continuous milling of the outer side of an anchor nut

Abstract

The application discloses an outer-side continuous milling device for anchor nuts, wherein a main shaft of a machine tool body is provided with an outer-side milling assembly, a floating clamp for the anchor nut is arranged on the machine tool body, and a cutting track of the outer-side milling assembly is tangent to an outer circle of the anchor nut on the floating clamp; the outer-side milling assembly is composed of two symmetrical circular cutters which are slidingly arranged on the main shaft, and the cutting track of the circular cutters is tangent to the outer circle of the anchor nut; the floating clamp comprises a fixed chuck assembly and a floating chuck assembly, the fixed chuck assembly is driven to rotate by a motor, the floating chuck assembly is driven to rotate by the fixed chuck assembly, a plurality of variable-distance clamping cavities for the anchor nut are formed between the fixed chuck assembly and the floating chuck assembly, and the smallest clamping cavity is matched with the anchor nut and is close to the outer-side milling assembly. The variable-distance clamping cavities generated by the floating clamp greatly facilitate the clamping and milling process of the anchor nut, and improve the work efficiency and yield.

Description

Technical Field

[0001] This invention relates to the field of anchor nut processing technology, and in particular to a continuous milling device for the outer side of an anchor nut. Background Technology

[0002] Anchor nuts are common components in anchoring systems, typically used in conjunction with anchor bolts. For ease of use, anchor nuts are generally machined with a polygonal outer shape, such as the common pentagonal or hexagonal anchor nuts. Current methods for machining the outer shape of anchor nuts involve clamping the nut in a machine tool chuck and then turning it. This clamping and loosening process is extremely time-consuming and inefficient.

[0003] Currently, existing technologies provide processing equipment that can continuously turn anchor nuts, such as patent document CN110860726A entitled "A Milling Device for Milling Hexagonal Nuts". This patent provides a technical means that can clamp multiple nuts and perform continuous processing. However, in this technical means, the first nut and the fixing ring of the fixing device clamp and fix the semi-finished hexagonal nut (equivalent to anchor nut) to be processed. At this time, the semi-finished hexagonal nut to be processed is set on the second adjusting rod.

[0004] The above-mentioned clamping and anchoring nut clamping methods require the first nut to be disassembled and reassembled each time, which cannot avoid the clamping and loosening process, wasting time and reducing work efficiency. Moreover, because the anchoring nut is designed to fit easily onto the second adjusting rod, there is usually a clearance between the two. This can cause the anchoring nut to wobble and rotate along the axis of the second adjusting rod during turning. The clamping of the anchoring nut is not stable, which may result in rough cut surfaces, burrs, and flash, thus affecting the machining quality. Summary of the Invention

[0005] The purpose of this invention is to provide a continuous milling device for anchor nuts, in order to solve the problems of wasted time in the clamping process, reduced work efficiency, and unstable clamping effect in existing nut milling devices, which affect the processing quality.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: An anchor nut external continuous milling device includes a machine tool body, an external milling assembly mounted on the machine tool spindle, and a floating fixture for anchoring the nut provided on the machine tool body. The cutting trajectory of the external milling assembly is tangent to the outer circle of the anchor nut on the floating fixture. The outer milling assembly consists of two symmetrically arranged circular milling cutters that are slidably mounted on the machine tool spindle. The circular milling cutters are locked to the machine tool spindle by screws, and the cutting trajectory of the circular milling cutters is tangent to the outer circle of the anchor nut on the floating fixture. The floating clamp includes a fixed clamping plate assembly and a floating clamping plate assembly. The fixed clamping plate assembly is driven to rotate by a motor, and the floating clamping plate assembly is driven to rotate by the fixed clamping plate assembly. A plurality of variable-pitch clamping cavities for the anchoring nut are formed between the fixed clamping plate assembly and the floating clamping plate assembly, and the clamping cavity with the smallest diameter is adapted to the anchoring nut and close to the outer milling assembly.

[0007] A further technical solution is: the fixed chuck assembly includes a fixed spindle, a fixed chuck, and a motor. The fixed spindle is connected to the power output end of the motor. The fixed chuck is mounted on the fixed spindle. A variable-pitch clamping cavity for the anchor nut is formed between the outer edge of the side of the fixed chuck and the floating chuck assembly.

[0008] A further technical solution is as follows: the floating chuck assembly includes a secondary shaft, a floating chuck, an elastic component, a push rod, and a retaining wheel. The secondary shaft is mounted on the machine tool body, the floating chuck is rotatably mounted on the secondary shaft, and a variable-pitch clamping cavity for the anchor nut is formed between the floating chuck and the fixed chuck assembly. The inner end of the secondary shaft is provided with a ball head adapted to the floating chuck. The elastic component is mounted on the secondary shaft and abuts against the outer side of the floating chuck. At least one push rod is slidably mounted on the floating chuck and connected to the fixed chuck assembly. The retaining wheel is rotatably mounted on the machine tool body and abuts against the outer side of the floating chuck.

[0009] A further technical solution is: the elastic component includes a baffle and several springs, the baffle is rotatably mounted on the secondary shaft, and the springs respectively abut against the baffle and the floating clamp.

[0010] A further technical solution is that an adjusting nut that abuts against the outside of the baffle is threaded onto the secondary shaft.

[0011] A further technical solution is that an anti-detachment block is provided at the end of the push rod that extends outward from the floating clamp.

[0012] A further technical solution is: the variable-pitch clamping cavity is provided with a positioning pin and a locking nut that is threadedly connected to the positioning pin and presses against the anchoring nut.

[0013] A further technical solution is that the positioning pin is disposed on the fixed clamping plate assembly.

[0014] A further technical solution is: a sliding groove is provided in the variable-pitch clamping cavity, and a V-shaped clip is detachably installed in the sliding groove, the V-shaped clip being adapted to the outer side of the anchoring nut.

[0015] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects: This invention proposes a continuous milling device for the outer side of anchor nuts. This device, with the help of a variable-distance clamping cavity generated by a floating fixture, greatly facilitates the clamping and milling process of anchor nuts, thereby improving work efficiency and output. The variable-pitch clamping cavity can change the spacing, that is, the clamping distance between the fixed clamping plate assembly and the floating clamping plate assembly. When the clamping distance is at its maximum, it facilitates the insertion of the anchor nut. When the clamping distance is at its minimum, it clamps the anchor nut to facilitate milling. When the clamping distance is between the maximum and minimum, or reaches the maximum again, it facilitates the removal of the anchor nut after cutting or automatic disengagement. The main advantage is that when the variable-pitch clamping cavity is in motion, it greatly reduces the clamping time of the anchor nut, optimizes the clamping method, reduces workload and manpower input, and ensures stable clamping effect, thus guaranteeing milling quality. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a continuous milling device for anchoring nuts according to the present invention.

[0017] Figure 2 For the present invention Figure 1 A schematic diagram of the structure of a floating fixture.

[0018] Figure 3 For the present invention Figure 1 A schematic diagram of the variable-pitch clamping cavity.

[0019] Reference numerals: 1. Outer milling assembly; 2. Anchor nut; 3. Floating clamp; 4. Fixed chuck assembly; 5. Floating chuck assembly; 6. Fixed spindle; 7. Fixed chuck; 8. Counterspindle; 9. Floating chuck; 10. Elastic component; 11. Push rod; 12. Thrust wheel; 13. Ball head; 14. Stop plate; 15. Spring; 16. Adjusting nut; 17. Anti-slip block; 18. Variable distance clamping cavity. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0022] It should be noted that, unless otherwise specified, the embodiments and features described in this invention can be combined with each other.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0024] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Example

[0026] This implementation example Figure 1 and Figure 2 As shown, an anchor nut external continuous milling device includes a machine tool body, an external milling component 1 mounted on the machine tool spindle, and a floating fixture 3 for anchoring the nut 2 provided on the machine tool body. The cutting trajectory of the external milling component 1 is tangent to the outer circle of the anchor nut 2 on the floating fixture 3; wherein, The outer milling assembly 1 consists of two symmetrically arranged circular milling cutters that are slidably mounted on the machine tool spindle. The circular milling cutters are locked to the machine tool spindle by screws, and the cutting trajectory of the circular milling cutters is tangent to the outer circle of the anchor nut 2 on the floating fixture 3. The floating clamp 3 includes a fixed clamping plate assembly 4 and a floating clamping plate assembly 5. The fixed clamping plate assembly 4 is driven to rotate by a motor, and the floating clamping plate assembly 5 is driven to rotate by the fixed clamping plate assembly 4. Multiple variable-pitch clamping cavities 18 for anchoring the nut 2 are formed between the fixed clamping plate assembly 4 and the floating clamping plate assembly 5. The clamping cavity with the smallest diameter is adapted to the anchoring nut 2 and close to the outer milling assembly 1.

[0027] By manually placing a feeding mechanism (sliding chute) as described in CN210498586U, entitled "Anchor Clip Cutting Device," the unmilled anchor nut 2 is fed into a variable-pitch clamping cavity 18 that rotates slowly and continuously at a certain speed. The rotation speed can be appropriately adjusted according to the working speed of each worker. At this time, the variable-pitch clamping cavity 18 is in a non-minimum state, that is, the clamping distance between the fixed clamping plate assembly 4 and the floating clamping plate assembly 5 is relatively large, at least greater than the outer diameter of the anchor nut 2. As the floating clamp 3 rotates, the anchor nut 2 is moved to the outer milling assembly. When the anchor nut 2 is in position 1, the clamping distance between the fixed clamping plate assembly 4 and the floating clamping plate assembly 5 is small, ensuring that both can clamp the anchor nut 2. This facilitates the milling of the two outer edges of the anchor nut 2 by two circular milling cutters. After one milling cycle, the floating fixture 3 continues to rotate, and the clamping distance between the fixed clamping plate assembly 4 and the floating clamping plate assembly 5 begins to increase. The clamped anchor nut 2 disengages from the variable-distance clamping cavity 18 and automatically falls down, changing its angle again before being placed back into the empty variable-distance clamping cavity 18 of the floating fixture 3. The other two outer edges are then machined until the hexagonal outer shape is formed. This clamping method is convenient, requiring only repeated actions of picking up, adjusting the angle, and placing the nut back into the variable-distance clamping cavity 18. It is simple, time-saving, reduces workload, and improves work efficiency.

[0028] Preferably, the fixed chuck assembly 4 includes a fixed spindle 6, a fixed chuck 7 and a motor. The fixed spindle 6 is connected to the power output end of the motor. The fixed chuck 7 is mounted on the fixed spindle 6. A variable-pitch clamping cavity 18 for anchoring the nut 2 is formed between the outer edge of the side of the fixed chuck 7 and the floating chuck assembly 5.

[0029] The fixed spindle 6 is driven by a motor to rotate the fixed chuck 7, which in turn drives the floating chuck assembly 5, specifically the floating chuck 9. Example

[0030] Based on the above embodiments, this embodiment shows that the floating chuck assembly 5 includes a secondary shaft 8, a floating chuck 9, an elastic component 10, a push rod 11, and a retaining wheel 12. The secondary shaft 8 is mounted on the machine tool body, the floating chuck 9 is rotatably mounted on the secondary shaft 8, and a variable-pitch clamping cavity 18 for anchoring the nut 2 is formed between the floating chuck 9 and the fixed chuck assembly 4. The inner end of the secondary shaft 8 is provided with a ball head 13 adapted to the floating chuck 9. The elastic component 10 is mounted on the secondary shaft 8 and abuts against the outer side of the floating chuck 9. At least one push rod 11 is slidably mounted on the floating chuck 9 and is connected to the fixed chuck assembly 4. The retaining wheel 12 is rotatably mounted on the machine tool body and abuts against the outer side of the floating chuck 9.

[0031] When the fixed clamping plate 7 rotates and the floating clamping plate 9 rotates together with it via the push rod 11, the stop wheel 12 will abut against the outside of the floating clamping plate 9, so that the floating clamping plate 9 and the fixed clamping plate 7 form a certain angle. When the anchoring nut 2 is in the variable distance clamping cavity 18, it will go through a process of large distance to small distance and then back to large distance. That is, the clamping distance between the fixed clamping plate assembly and the floating clamping plate assembly changes. When the clamping distance is at its maximum, it is convenient to insert the anchoring nut. When the clamping distance is at its minimum, the anchoring nut is clamped to facilitate milling. When the clamping distance is between the maximum and minimum, or reaches the maximum again, it is convenient to remove the anchoring nut after cutting or to automatically detach it. The main reason is that when the variable distance clamping cavity is in motion, it greatly reduces the clamping time of the anchoring nut, optimizes the clamping method, reduces the workload and manpower input, and the clamping effect is stable, ensuring the milling quality. The ball head 13 facilitates the tilting and rotation of the floating clamp 9 and prevents it from slipping off. The push rod 11 can slide radially within the floating clamp 9 without interfering with the tilting rotation of the floating clamp 9; The elastic component 10 is used to reset the floating chuck 9 when it tilts and rotates, ensuring that the tilting and rotation angle is fixed, that is, the minimum position of the spacing of the variable pitch clamping cavity 18 is fixed, which is compatible with the cone sleeve fixing during the saw blade 3 cutting process.

[0032] Preferably, the elastic component 10 includes a baffle 14 and a plurality of springs 15, the baffle 14 being rotatably mounted on the sub-shaft 8, and the springs 15 respectively abutting against the baffle 14 and the floating clamp 9.

[0033] Spring 15 has a telescopic effect, which can ensure that the tilting and rotation angle of floating chuck 9 is fixed.

[0034] Preferably, a tightening nut 16 is threaded onto the countershaft 8 to abut against the outside of the retaining plate 14.

[0035] The adjusting nut 16 is used to position the retaining plate 14 on the secondary shaft 8, thereby controlling the spring force of the spring 15 on the floating clamp 9.

[0036] Preferably, an anti-detachment block 17 is provided at the end of the push rod 11 that extends outward from the floating chuck 9.

[0037] To prevent the floating clamp 9 from separating from the fixed clamp 7. Example

[0038] Based on the above embodiments, this embodiment, for example Figure 3 As shown, the variable-pitch clamping cavity 18 is provided with a positioning pin 19 and a locking nut 20 that is threadedly connected to the positioning pin 19 and presses against the anchoring nut 2.

[0039] When the positioning pin 19 is inserted into the variable-distance clamping cavity 18, it facilitates the quick positioning and pre-fixation of the anchor nut 2 in the variable-distance clamping cavity 18. The locking nut 20 is used to cooperate with the positioning pin 19 to lock the anchor nut 2 in place, further ensuring the fixing effect. However, it prolongs the installation and removal time of the anchor nut 2, so the working speed of the device needs to be slowed down.

[0040] Preferably, the positioning pin 19 is disposed on the fixed clamping plate assembly 4.

[0041] The positioning pin 19 is on the fixed clamping plate assembly 4, and its position only changes circumferentially, which facilitates the insertion of the anchoring nut 2 into the variable distance clamping cavity 18.

[0042] Preferably, a sliding groove is provided in the variable-pitch clamping cavity 18, and a V-shaped clip 21 is detachably installed in the sliding groove. The V-shaped clip 21 is adapted to the outer side of the anchor nut 2.

[0043] The V-shaped clip 21 can be quickly assembled and disassembled with the variable-pitch clamping cavity 18 using the principle of magnetic adsorption. After the anchor nut 2 is machined with two adjacent outer sides (i.e., the outer side has at least one corner), the V-shaped clip 21 is used to lock (i.e. fix) this outer corner, which facilitates the subsequent precise machining of the outer side (outer corner).

[0044] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A continuous milling device for anchoring nuts, comprising a machine tool body, characterized in that: An external milling assembly (1) is mounted on the spindle of the machine tool body, and a floating fixture (3) for anchoring the nut (2) is provided on the machine tool body. The cutting trajectory of the external milling assembly (1) is tangent to the outer circle of the anchoring nut (2) on the floating fixture (3); wherein, The outer milling assembly (1) consists of two symmetrically arranged and slidably mounted circular milling cutters on the machine tool spindle. The circular milling cutters are locked to the machine tool spindle by screws. The cutting trajectory of the circular milling cutters is tangent to the outer circle of the anchor nut (2) on the floating fixture (3). The floating clamp (3) includes a fixed clamping plate assembly (4) and a floating clamping plate assembly (5). The fixed clamping plate assembly (4) is driven to rotate by a motor, and the floating clamping plate assembly (5) is driven to rotate by the fixed clamping plate assembly (4). A plurality of variable-pitch clamping cavities (18) for the anchoring nut (2) are formed between the fixed clamping plate assembly (4) and the floating clamping plate assembly (5), and the clamping cavity with the smallest diameter is adapted to the anchoring nut (2) and close to the outer milling assembly (1). The floating chuck assembly (5) includes a secondary shaft (8), a floating chuck (9), an elastic component (10), a push rod (11), and a retaining wheel (12). The secondary shaft (8) is mounted on the machine tool body. The floating chuck (9) is rotatably mounted on the secondary shaft (8). A variable-pitch clamping cavity (18) for the anchor nut (2) is formed between the floating chuck (9) and the fixed chuck assembly (4). The inner end of the secondary shaft (8) is provided with a ball head (13) that is adapted to the floating chuck (9). The elastic component (10) is mounted on the secondary shaft (8) and abuts against the outer side of the floating chuck (9). At least one push rod (11) is slidably mounted on the floating chuck (9) and is connected to the fixed chuck assembly (4). The retaining wheel (12) is rotatably mounted on the machine tool body and abuts against the outer side of the floating chuck (9).

2. The continuous milling device for anchoring nuts according to claim 1, characterized in that: The fixed chuck assembly (4) includes a fixed spindle (6), a fixed chuck (7) and a motor. The fixed spindle (6) is connected to the power output end of the motor. The fixed chuck (7) is mounted on the fixed spindle (6). A variable-pitch clamping cavity (18) for the anchor nut (2) is formed between the outer edge of the side of the fixed chuck (7) and the floating chuck assembly (5).

3. The continuous milling device for anchoring nuts according to claim 1, characterized in that: The elastic component (10) includes a baffle (14) and several springs (15). The baffle (14) is rotatably mounted on the sub-shaft (8), and the springs (15) abut against the baffle (14) and the floating clamp (9) respectively.

4. The continuous milling device for anchoring nuts according to claim 3, characterized in that: The auxiliary shaft (8) is threaded with an adjusting nut (16) that abuts against the outside of the baffle (14).

5. The continuous milling device for anchoring nuts according to claim 1, characterized in that: The push rod (11) has an anti-detachment block (17) at one end extending outside the floating chuck (9).

6. The continuous milling device for anchoring nuts according to claim 1, characterized in that: The variable-pitch clamping cavity (18) is provided with a positioning pin (19) and a locking nut (20) that is threadedly connected to the positioning pin (19) and presses against the anchor nut (2).

7. The continuous milling device for anchoring nuts according to claim 6, characterized in that: The positioning pin (19) is disposed on the fixed clamp assembly (4).

8. The continuous milling device for anchoring nuts according to claim 1, characterized in that: The variable-pitch clamping cavity (18) is provided with a sliding groove, and a V-shaped clip (21) is detachably installed in the sliding groove. The V-shaped clip (21) is adapted to the outer side of the anchor nut (2).

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