Thread milling cutter with anti-retracting mechanism

Abstract

The thread milling cutter comprises a thread milling cutter body, a limiting column is installed at the top end of the thread milling cutter body in a bolting mode, a plurality of sets of containing grooves are formed in the outer arc face of the limiting column in an equal-radian mode, and a plurality of sets of arc-shaped anti-skid pads are adhered to the outer arc face of the limiting column at equal intervals. And a group of stress plates are rotationally mounted in each group of storage grooves. When the thread milling cutter body is inserted into a machine tool to be locked, the locking structure can bear force on the stress rod, so that the stress rod is pressed into the limiting hole to bear force on one end of the stress plate, the other end of the stress plate is tilted, and the trapezoidal non-slip mat is attached to the interior of the locking structure; therefore, the trapezoidal non-slip mats can extend outwards all the time to be attached, the situation that the thread milling cutter body does not retract in the whole using process is kept, the arc-shaped non-slip mats are pressed in the tightening process of the locking structure, and the anti-retracting effect is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tool materials for chip processing, in particular to a thread milling cutter with an anti-retraction mechanism. Background Art

[0002] Traditional internal thread processing mainly uses taps for manual or motorized tapping of threads. Due to the large cutting contact area and large cutting force, the thread milling cutter is easily retracted, causing the tap to break, often resulting in the scrapping of parts and a waste of manpower and cost.

[0003] The Chinese utility model patent with publication number CN201871832U discloses a thread milling cutter for milling threads. The thread milling cutter includes a cutting head for cutting a workpiece and a tool holder for clamping, and is characterized in that it also includes a tool bar connecting the tool holder and the cutting head, the diameter of the tool bar is smaller than the diameter of the cutting head and the tool holder, the cutting head is circumferentially provided with a plurality of cutting segments, and the cutting segments are axially provided with a plurality of cutting teeth, and the structures of the various cutting segments are the same. Through the provided tool holder, the thread milling cutter can process internal hole threads with deeper holes, thereby expanding the scope of use of the thread milling cutter. The thread milling cutter described in the utility model has a plurality of cutting teeth, which effectively improves the processing rate of the thread during processing, and is suitable for large-scale internal thread processing production.

[0004] The above-mentioned public documents do not provide a structure for preventing the thread milling cutter from retreating during use, and the cutter may still retreat during high-intensity processing. Therefore, a thread milling cutter with an anti-retreat mechanism is now needed. Utility Model Content

[0005] The purpose of the utility model is to provide a thread milling cutter with an anti-retraction mechanism. When the thread milling cutter body is inserted into a machine tool and locked by a locking structure, the force-bearing rod is pressed so that the trapezoidal anti-slip pad pops out and presses against the inner wall of the locking mechanism, thereby completing the anti-retraction work and solving the technical problems mentioned in the background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a thread milling cutter with an anti-retraction mechanism, comprising a thread milling cutter body, a limiting column bolted to the top, a plurality of groups of receiving grooves with equal arcs on the outer arc surface of the limiting column, and a plurality of groups of arc-shaped anti-slip pads equidistantly glued to the outer arc surface of the limiting column;

[0007] A group of force-bearing plates are rotatably installed inside each group of the storage slots, a force-bearing rod is fixedly installed on the outside of one end of the force-bearing plate, and a trapezoidal anti-skid pad is fitted on the outside of the other end of the force-bearing plate.

[0008] Preferably, a plurality of groups of slots are provided on the outer arc surface of the thread milling cutter body, and a threaded hole is provided on the top of the thread milling cutter body.

[0009] Preferably, a threaded column is fixedly installed at the bottom of the limiting column, and the threaded column is threadedly installed inside the threaded hole.

[0010] Preferably, two groups of positioning holes are symmetrically opened on the inner wall of each group of the storage grooves, and installation grooves are symmetrically opened in the middle of both sides of the force-bearing plate. A positioning shaft is installed through the center of the installation groove, and both ends of the positioning shaft are respectively inserted into a group of positioning holes for rotatable installation.

[0011] Preferably, a support spring is fixedly installed on the other side of one end of the force-bearing plate corresponding to the installation position of the force-bearing rod, and the other end of the support spring is fixedly installed inside the storage groove.

[0012] Preferably, a group of arc-shaped baffles are fitted on the lower side of the inner part of each group of the storage grooves, and a limiting hole is provided through the middle of each group of the arc-shaped baffles, and the force-bearing rods are movably extended from the inner part of the limiting hole.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] When the thread milling cutter body is inserted into the machine tool and locked, the locking structure will exert force on the force-bearing rod, so that the force-bearing rod is pressed into the limiting hole to exert force on one end of the force plate, so that the other end of the force plate is tilted, and the trapezoidal anti-skid pad fits the inside of the locking structure. Since the locking structure keeps the force on the force-bearing rod when locking the thread milling cutter body, the trapezoidal anti-skid pad will always extend outward and fit, so that the thread milling cutter body will not retreat during the overall use, and the arc-shaped anti-skid pad will be compressed during the tightening of the locking structure to further enhance the anti-retreat effect. At the same time, when the thread milling cutter body is removed, the locking structure is loosened, so that the support spring supports one end of the force plate to reset the force rod, and the trapezoidal anti-skid pad will be recovered to the inside of the storage slot, the anti-retreat state is released, and the thread milling cutter body can be smoothly pulled out. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the installation structure of the limit column of the utility model;

[0017] Figure 3 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 4 This is a schematic diagram of the split installation structure of the load-bearing plate of the utility model;

[0019] Figure 5 It is a schematic diagram of the overall structure disassembly of the load-bearing plate of the utility model.

[0020] In the figure: 1. thread milling cutter body; 2. slot; 3. threaded hole; 4. limit column; 5. threaded column; 6. arc-shaped anti-skid pad; 7. storage slot; 8. positioning hole; 9. force plate; 10. installation slot; 11. positioning shaft; 12. force rod; 13. support spring; 14. trapezoidal anti-skid pad; 15. arc-shaped baffle; 16. limit hole. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] The utility model provides: a thread milling cutter with an anti-retraction mechanism, such as Figure 1-Figure 5 As shown, it includes a threaded milling cutter body 1, a limiting column 4 is bolted to the top, a plurality of groups of receiving grooves 7 with equal curvature are opened on the outer arc surface of the limiting column 4, and a plurality of groups of arc-shaped anti-skid pads 6 are equidistantly adhered to the outer arc surface of the limiting column 4; a group of force plates 9 are rotatably installed inside each group of receiving grooves 7, a force rod 12 is fixedly installed on the outer side of one end of the force plate 9, and a trapezoidal anti-skid pad 14 is fitted on the outer side of the other end of the force plate 9.

[0023] Preferably, a plurality of groups of slots 2 are provided on the outer arc surface of the thread milling cutter body 1, and a threaded hole 3 is provided on the top of the thread milling cutter body 1. The slots 2 provided on the outer arc surface of the thread milling cutter body 1 are used to cooperate with the locking structure of the machine tool to limit the thread milling cutter body 1, thereby improving the stability of the thread milling cutter body 1 during use. The threaded hole 3 provided on the top of the thread milling cutter body 1 is threadedly matched with the threaded column 5 at the bottom of the limiting column 4, so that the limiting column 4 can be movably disassembled so as to be replaced to the upper part of the thread milling cutter body 1 of different specifications, thereby reducing the use cost through recycling.

[0024] Furthermore, a threaded column 5 is fixedly installed at the bottom of the limiting column 4, and the threaded column 5 is threadedly installed inside the threaded hole 3. The threaded column 5 is threadedly installed inside the threaded hole 3 to ensure the connectivity between the thread milling cutter body 1 and the limiting column 4, so that the thread milling cutter body 1 and the limiting column 4 become a main body. After the trapezoidal anti-slip pad 14 is expanded under force, it can stably support the thread milling cutter body 1 to avoid the situation where the thread milling cutter body 1 retreats during use.

[0025] Furthermore, two groups of positioning holes 8 are symmetrically opened on the inner wall of each group of storage grooves 7, and installation grooves 10 are symmetrically opened in the middle of both sides of the force-bearing plate 9. A positioning shaft 11 is installed through the center of the installation groove 10, and the two ends of the positioning shaft 11 are respectively inserted into a group of positioning holes 8 for rotatable installation. The opened storage grooves 7 accommodate the force-bearing plates 9, so that the trapezoidal anti-slip pads 14 will not extend out when the force-bearing plates 9 are not under force, reducing the impact on the insertion of the thread milling cutter body 1 into the locking structure of the machine tool. The positioning holes 8 opened on the inner wall of the storage grooves 7 limit the positioning shafts 11, so that when one end of the force-bearing plate 9 is under force, the trapezoidal anti-slip pads 14 can extend out and fit the inner wall of the locking structure to complete the support.

[0026] It is worth mentioning that a support spring 13 is fixedly installed on the other side of one end of the force-bearing plate 9 corresponding to the installation position of the force-bearing rod 12, and the other end of the support spring 13 is fixedly installed inside the storage groove 7. The force-bearing rod 12 installed at one end of the force-bearing plate 9 changes the force point of the force-bearing plate 9. When the locking structure shrinks and fixes the thread milling cutter body 1, it shrinks inward to complete the pressure on one end of the force-bearing plate 9. The installed support spring 13 can support one end of the force-bearing plate 9 when it is necessary to remove the thread milling cutter body 1 to loosen the locking structure, so that the force-bearing plate 9 is reset, the trapezoidal anti-slip pad 14 is recovered, and the thread milling cutter body 1 as a whole can be pulled out from the inside of the locking mechanism more smoothly.

[0027] Specifically, a group of arc-shaped baffles 15 are fitted on the lower side of the inner part of each group of storage grooves 7, and a limiting hole 16 is provided through the middle of each group of arc-shaped baffles 15. The force-bearing rod 12 extends out from the limiting hole 16, and the limiting hole 16 provided in the center of the arc-shaped baffle 15 limits the force-bearing rod 12. The limiting hole 16 has a certain curvature at the beginning, so that the force-bearing rod 12 can be rotated and pressed downward around the positioning axis 11 when the force is applied, thereby achieving the purpose of pushing out the trapezoidal anti-slip pad 14.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A thread milling cutter with an anti-retraction mechanism, characterized in that: The invention comprises a thread milling cutter body (1), a limiting column (4) being bolted and installed at the top end, a plurality of groups of receiving grooves (7) being provided on the outer arc surface of the limiting column (4) with equal arcs, and a plurality of groups of arc-shaped anti-skid pads (6) being glued to the outer arc surface of the limiting column (4) at equal distances; A group of force-bearing plates (9) are rotatably mounted inside each group of the storage slots (7), a force-bearing rod (12) is fixedly mounted on the outside of one end of the force-bearing plate (9), and a trapezoidal anti-slip pad (14) is fitted on the outside of the other end of the force-bearing plate (9).

2. A thread milling cutter with an anti-retraction mechanism according to claim 1, characterized in that: The outer arc surface of the thread milling cutter body (1) is provided with a plurality of groups of slots (2), and the top of the thread milling cutter body (1) is provided with a threaded hole (3).

3. A thread milling cutter with an anti-retraction mechanism according to claim 2, characterized in that: A threaded column (5) is fixedly mounted on the bottom of the limiting column (4), and the threaded column (5) is threadedly mounted inside the threaded hole (3).

4. A thread milling cutter with an anti-retraction mechanism according to claim 3, characterized in that: Two groups of positioning holes (8) are symmetrically provided on the inner wall of each group of the storage grooves (7), and installation grooves (10) are symmetrically provided in the middle of both sides of the force-bearing plate (9). A positioning shaft (11) is installed through the center of the installation groove (10), and the two ends of the positioning shaft (11) are respectively inserted into a group of positioning holes (8) for rotational installation.

5. A thread milling cutter with an anti-retraction mechanism according to claim 4, characterized in that: A support spring (13) is fixedly installed on the other side of one end of the force-bearing plate (9) corresponding to the installation position of the force-bearing rod (12), and the other end of the support spring (13) is fixedly installed inside the storage groove (7).

6. A thread milling cutter with an anti-retraction mechanism according to claim 5, characterized in that: A group of arc-shaped baffles (15) is fitted on the lower side of the interior of each group of the storage grooves (7), and a limiting hole (16) is provided through the middle of each group of the arc-shaped baffles (15), and the force-bearing rod (12) is movably extended from the inside of the limiting hole (16).

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