A machine tap

Abstract

The present application relates to a machine tap, comprising: a tap body; a first mounting ring, rotatably mounted on the tap body; a first connecting rod, provided with a plurality of rods, arranged on the first mounting ring; a second connecting rod, provided with a plurality of rods corresponding to the first connecting rod, correspondingly slidably mounted on the first connecting rod; a brush ring, sleeved on the end of the tapping end of the tap body, connected to the second connecting rod, the inner ring of which is provided with bristles pressed against the side wall of the tapping end of the tap body; an elastic member, used to push the first connecting rod and the second connecting rod to expand. Through the above technical solution, when the tap body is tapped, as the main shaft of the machine tool descends, the elastic member pushes the brush ring against the machining surface of the workpiece, so that the brush ring is fixed when the tap body rotates, and the machining groove of the tap body is cleaned by the bristles of the brush ring, so that the tap body is not easily disturbed by iron chips in the machining groove when machining the thread, thereby improving the machining quality of the thread.

Description

Technical Field

[0001] The present application relates to the technical field of tapping tools, and in particular to a machine tap. Background Art

[0002] A tap is a tool used to tap the inner wall of a hole during machining. After the machining center completes the drilling operation on the part, the tool holder for mounting the tool is removed and replaced with the tool holder for mounting the tap to tap the hole.

[0003] There are four types of taps: straight groove taps, spiral groove taps, angled taps and extrusion taps. The most common and versatile type of tap is the straight groove tap, which can process through holes or blind holes, non-ferrous metals or ferrous metals. Straight groove taps are relatively cheap and can effectively reduce production costs.

[0004] With respect to the above-mentioned related technologies, the inventors believe that the following defects exist: during the machining process of the straight groove tap, iron chips are easily left in the machining groove of the straight groove tap. The iron chips in the machining groove of the straight groove tap are cleaned by spraying chip fluid in a conventional machining center, but the cleaning effect is poor, and some iron chips will still remain in the machining groove. When machining the next thread, the iron chips remaining in the machining groove will affect the thread machining and reduce the thread machining quality. Summary of the invention

[0005] In order to solve the problem that traditional machining centers clean and cool straight groove taps by spraying cutting fluid, which causes iron filings to remain in the machining groove of the straight groove tap and affect the thread machining of the next hole, the present application provides a machine tap.

[0006] The present application provides a machine tap that adopts the following technical solution:

[0007] A machine tap, comprising:

[0008] Tap body;

[0009] A first mounting ring, rotatably mounted on the tap body;

[0010] A first connecting rod, provided with a plurality of rods, provided on the first mounting ring;

[0011] A second connecting rod is provided with a plurality of rods corresponding to the first connecting rods and is slidably mounted on the first connecting rods;

[0012] A brush ring, sleeved on the end of the tapping end of the tap body, connected to the second connecting rod, and having an inner ring provided with bristles pressed against the side wall of the tapping end of the tap body;

[0013] The elastic member is used to push the first connecting rod and the second connecting rod to unfold.

[0014] Through the above technical solution, when the tap body is tapping, as the spindle of the machine tool descends, the elastic part pushes the brush ring against the processing surface of the workpiece, so that the brush ring is fixed when the tap body rotates, and the processing groove of the tap body is cleaned by the bristles of the brush ring, so that the tap body is not easily disturbed by iron chips in the processing groove when processing the thread, thereby improving the processing quality of the thread.

[0015] Optionally, the first mounting ring includes a connecting ring rotatably mounted on the tap body and an annular oil tank coaxially arranged on the outer wall of the connecting ring, the first connecting rod is arranged on the oil tank, the first connecting rod and the second connecting rod are both tubular, the first connecting rod is connected to the oil tank, the second connecting rod is slidably sleeved on the first connecting rod, and the second connecting rod is provided with an oil outlet pipe, and the oil outlet pipe is used to drip oil on the bristles of the brush ring.

[0016] Optionally, a sealing plug is provided at one end of the first connecting rod located inside the second connecting rod, and the sealing plug is sealingly slidably installed in the second connecting rod. An air inlet pipe is provided on one side of the oil tank facing the connecting end of the tap body and the machine tool tool holder, and the air inlet pipe is connected to the oil tank. The inner diameter of the air inlet end of the air inlet pipe is smaller than the inner diameter of the air inlet pipe. A plurality of first baffles are provided in the air inlet pipe, and a first sealing ball is provided in the air inlet pipe between the first baffle and the air inlet end of the air inlet pipe, and the outer diameter of the first sealing ball is larger than the outer diameter of the first sealing ball. The inner diameter of the air inlet end of the air inlet pipe is smaller than the inner diameter of the air inlet pipe, the first sealing ball can slide to close the air inlet end of the air inlet pipe, the inner diameter of the oil inlet end of the oil outlet pipe is smaller than the inner diameter of the oil outlet pipe, a plurality of second baffles are provided on the inner wall of the oil outlet pipe, a second sealing ball is provided in the oil outlet pipe between the second baffle and the oil inlet end of the oil outlet pipe, the outer diameter of the second sealing ball is larger than the inner diameter of the oil inlet end of the oil outlet pipe and smaller than the inner diameter of the oil outlet pipe, and the second sealing ball can slide to close the oil inlet end of the oil outlet pipe.

[0017] Optionally, a maintaining spring is provided between the second sealing ball and the second baffle, and the maintaining spring pushes the second sealing ball to press against the inner wall of the oil inlet end of the oil outlet pipe.

[0018] Optionally, the end of the first connecting rod is closed, and an oil outlet hole is formed on the side wall of one end of the first connecting rod located inside the second connecting rod. The sealing plug is slidably installed on the first connecting rod, and an adjusting sleeve is threadedly installed on the first connecting rod. The adjusting sleeve is connected to the sealing plug, and the adjusting sleeve can be rotated to the sealing plug to close the oil outlet hole.

[0019] Optionally, the adjustment sleeve is slidingly matched with the inner hole of the second connecting rod.

[0020] Optionally, a mounting rod is provided on the outer side wall of the second connecting rod, and the mounting rod is slidably fitted with the first mounting ring. A sealing plate is provided at one end of the mounting rod, and the sealing plate is provided with a rubber layer. When the first connecting rod and the second connecting rod are unfolded, the rubber layer presses against the intake end of the intake pipe to close the intake end.

[0021] Optionally, the brush ring includes a second mounting ring and a ring-shaped brush, the second mounting ring is connected to the end of the second connecting rod, and the brush is mounted on the second mounting ring by bolts.

[0022] Optionally, a friction ring is provided on the end surface of the brush facing away from the second mounting ring, and the friction ring is provided with a connecting column, and the connecting column is inserted in a hole of the brush for mounting bolts.

[0023] Optionally, the end of the oil outlet pipe is bent along the brush, the bent ends of the oil outlet pipe are connected head to tail to form a ring, and a plurality of oil outlets are provided on the side wall of the bent end of the oil outlet pipe.

[0024] To summarize, the present application provides a brush ring on the tap body, so that during the rotation and descent of the tap body, the bristles of the brush ring that are pressed and fixed on the machining surface of the workpiece by the elastic member can clean the machining groove of the tap body, so that it is less likely for iron filings to remain in the machining groove of the tap body, thereby improving the machining quality of the machine tool during continuous thread machining. At the same time, when the first connecting rod descends, the oil in the second connecting rod will be pressed out of the second connecting rod and drip onto the brush, and the tap body will be cooled and lubricated by the brush, thereby increasing the service life of the tap body. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a three-dimensional structural schematic diagram of this application.

[0026] Figure 2 It is a cross-sectional view of this application.

[0027] Figure 3 yes Figure 2 Enlarged schematic diagram of part A in the middle.

[0028] Figure 4 yes Figure 2 Enlarged schematic diagram of part B in the middle.

[0029] Figure 5 It is a cross-sectional view of the intake pipe of the present application.

[0030] Those skilled in the art will appreciate that the elements in the drawings are shown for simplicity and clarity and are not necessarily drawn to scale. For example, the size and position of some elements in the drawings may be exaggerated relative to other elements to help improve understanding of the embodiments of the present invention.

[0031] 1. Tap body; 2. First mounting ring; 21. Connecting ring; 22. Oil tank; 23. Air inlet pipe; 231. First baffle; 232. First sealing ball; 3. First connecting rod; 31. Sealing plug; 32. Adjusting sleeve; 33. Oil outlet; 4. Second connecting rod; 41. Oil outlet pipe; 411. Second baffle; 412. Second sealing ball; 413. Maintaining spring; 414. Oil outlet; 5. Brush ring; 51. Second mounting ring; 52. Brush; 53. Friction ring; 531. Connecting column; 6. Elastic member; 61. Spring sheet; 7. Mounting rod; 71. Sealing plate; 72. Rubber layer. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1 —5 Further details of this application are provided.

[0033] The present application embodiment discloses a machine tap, referring to Figure 1 , comprises a tap body 1, a first mounting ring 2 and a brush ring 5.

[0034] Reference Figure 1 and Figure 2 The first mounting ring 2 includes a connecting ring 21 rotatably mounted on the mounting end of the tap body 1 and an annular oil tank 22 coaxially fixedly mounted on the outer wall of the connecting ring 21. An air inlet pipe 23 is integrally provided on one side of the oil tank 22 facing the mounting section of the tap body 1. A plurality of first connecting rods 3 are fixedly mounted at intervals around the axis of the oil tank 22 facing the tapping end of the tap body 1. The first connecting rod 3 is provided with a second connecting rod 4. Both the first connecting rod 3 and the second connecting rod 4 are tubular. A sealing plug 31 is coaxially slidably mounted on one end of the first connecting rod 3 and an adjusting sleeve 32 is threadedly mounted. Both the adjusting sleeve 32 and the sealing plug 31 are coaxially slidably mounted in the second connecting rod 4. The sealing plug 31 and the inner hole of the second connecting rod 4 are sealed.

[0035] Reference Figure 1 , Figure 2 and Figure 3 The first connecting rod 3 is parallel to the tap body 1, the end of the first connecting rod 3 is closed, and an oil outlet hole 33 is opened on the side wall of one end of the first connecting rod 3 located inside the second connecting rod 4. The first connecting rod 3 is connected to the oil tank 22, and the oil in the oil tank 22 flows along the inner hole of the first connecting rod 3 and then flows out from the oil outlet hole 33 to the inside of the second connecting rod 4.

[0036] Reference Figure 2 and Figure 3 , rotating the adjusting sleeve 32 can push the sealing plug 31 to close the oil outlet 33, thereby adjusting the oil output of the oil tank 22.

[0037] Reference Figure 1 and Figure 5 The inner diameter of the air inlet end of the air inlet pipe 23 is smaller than the inner diameter of the air inlet pipe 23. The inner wall of the air inlet pipe 23 is integrally provided with a plurality of first baffles 231 circumferentially spaced around the axis thereof. A first sealing ball 232 is provided in the air inlet pipe 23 between the first baffle 231 and the air inlet end of the air inlet pipe 23. The outer diameter of the first sealing ball 232 is larger than the inner diameter of the air inlet end of the air inlet pipe 23 and smaller than the inner diameter of the air inlet pipe 23. The first sealing ball 232 can be moved to close the air inlet end of the air inlet pipe 23.

[0038] Reference Figure 1 , Figure 2 and Figure 4 The inner diameter of the oil inlet end of the oil outlet pipe 41 is smaller than the inner diameter of the oil outlet pipe 41 , and a plurality of second baffles 411 are integrally provided on the inner wall of the oil outlet pipe 41 at circumferential intervals around its axis. A second sealing ball 412 is provided in the oil outlet pipe 41 between the second baffle 411 and the oil inlet end of the oil outlet pipe 41 , and the outer diameter of the second sealing ball 412 is larger than the inner diameter of the oil inlet end of the oil outlet pipe 41 and smaller than the inner diameter of the oil outlet pipe 41 .

[0039] Reference Figure 1 , Figure 2 and Figure 4 The brush ring 5 includes a second connecting ring 21 and an annular brush 52 . The second connecting ring 21 is fixedly connected to the end of the second connecting rod 4 . The second connecting ring 21 is coaxial with the tap body 1 . The tap body 1 can pass through the second connecting ring 21 .

[0040] Reference Figure 1 , Figure 2 and Figure 4 The brush 52 is coaxially fixedly installed on the second connecting ring 21 by bolts, and the bristles of the brush 52 are pressed against the side wall of the tapping end of the tap body 1, and the bristles of the brush 52 are inclined toward the tapping end of the tap body 1.

[0041] Reference Figure 1 , Figure 2 and Figure 4 A friction ring 53 made of rubber is coaxially provided on one end face of the brush ring 5 away from the second mounting ring 51. A plurality of connecting columns 531 are integrally provided on the friction ring 53. The connecting columns 531 are interference-inserted into the holes of the brush ring 5 for mounting bolts.

[0042] Reference Figure 1 An elastic member 6 is provided between the second mounting ring 51 and the first mounting ring 2. The elastic member 6 includes a plurality of spring sheets 61. The two ends of the spring sheets 61 are fixedly connected to the second mounting ring 51 and the oil tank 22, respectively. Under normal conditions, the spring sheets 61 push the first connecting rod 3 and the second connecting rod 4 to be in an extended state. At this time, the tapping end of the tap body 1 is located between the brush ring 5 and the first mounting ring 2.

[0043] Reference Figure 1The oil outlet end of the oil outlet pipe 41 is curved and interconnected to form a ring. An oil outlet port 414 is provided at the oil outlet end of the oil outlet pipe 41 , and the oil drips onto the brush 52 from the oil outlet port 414 .

[0044] Reference Figure 4 A retaining spring 413 is provided between the second sealing ball 412 and the second baffle 411. The retaining spring 413 pushes the second sealing ball 412 against the oil inlet end side wall of the oil outlet pipe 41. At this time, the oil inlet end of the oil outlet end is closed by the second sealing ball 412. A mounting rod 7 is slidably installed on the outer wall of the oil tank 22. One end of the mounting rod 7 is fixedly installed on the side wall of the second connecting rod 4. The other end of the mounting rod 7 is integrally provided with a sealing plate 71. A rubber layer 72 is fixedly laid on one side of the sealing plate 71. When the first connecting rod 3 and the second connecting rod 4 are in an extended state, the rubber layer 72 fits tightly against the air inlet end of the air inlet pipe 23 to close the air inlet end of the air inlet pipe 23.

[0045] The implementation principle of a machine tap in the embodiment of the present application is as follows: before processing the thread on the tap body 1, first press the second mounting ring 51 toward the first mounting ring 2 so that the air inlet end of the air inlet pipe 23 is opened, connect the quick connector to the air inlet pipe 23, and add oil into the oil tank 22 through the quick connector until the oil drips from the oil outlet 414 to complete the refueling.

[0046] Then, the tap body 1 is mounted on the tool handle, and the tool handle is mounted on the spindle of the machine tool, and the spindle is started for tapping. When the spindle descends, the spring sheet 61 pushes the friction ring 53 on the brush ring 5 to press against the machining surface of the workpiece, and the brush ring 5 is fixed. As the spindle continues to descend, the oil tank 22 synchronously drives the first connecting rod 3 to descend, and the first connecting rod 3 drives the sealing plug 31 to descend, so that the space in the second connecting rod 4 is reduced, and then under the action of pressure, the first sealing ball 232 closes the air inlet end of the air inlet pipe 23 and opens the oil inlet end of the oil outlet pipe 41, and the oil drips from the oil outlet end of the oil outlet pipe 41 onto the brush 52, and then flows along the bristles of the brush 52 to the side wall of the tap body 1, and as the tap body 1 and the brush 52 rotate relative to each other, the brush 52 evenly applies the oil to the machining groove of the tap body 1, and at the same time, the brush 52 sweeps out the iron filings in the machining groove of the tap body 1.

[0047] When the processing is completed, as the tap body 1 rises, the first connecting rod 3 and the second connecting rod 4 are extended again under the push of the spring sheet 61, the space inside the second connecting rod 4 increases and the pressure decreases. At this time, under the action of the maintaining spring 413 and the external atmospheric pressure, the second sealing ball 412 fits tightly against the oil inlet end of the oil outlet pipe 41 to close the oil outlet pipe 41. Under the action of the external atmospheric pressure, air enters the oil tank 22, thereby pushing the oil into the first connecting rod 3 and the second connecting rod 4, completing the refilling of the oil.

[0048] When the tap body 1 is reset, the sealing plate 71 seals the air inlet end of the air inlet pipe 23, so that oil does not continue to drip from the oil outlet pipe 41. At the same time, the spring 413 pushes the second sealing ball 412 to seal the oil inlet end of the oil outlet pipe 41, further preventing oil from dripping from the oil outlet pipe 41, which would cause oil waste due to continuous dripping of oil when the tap body 1 is not in working state.

[0049] At the same time, the spring 413 is maintained so that the second sealing ball 412 is not easily stuck on the second baffle 411 when it needs to be reset, resulting in failure of oil filling when the tap body 1 is reset.

[0050] The amount of oil applied to the tap body 1 varies according to the tapping depth of the thread and the material of the workpiece. By rotating the adjusting sleeve 32, the sealing plug 31 closes the oil outlet 33 of the first connecting rod 3, thereby adjusting the oil output of the oil tank 22 each time the first connecting rod 3 is pressed down.

[0051] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A machine tap, characterized in that: include: Tap body (1); A first mounting ring (2) rotatably mounted on the tap body (1); A plurality of first connecting rods (3) are provided and are arranged on the first mounting ring (2); The second connecting rod (4) is provided with a plurality of corresponding ones of the first connecting rod (3) and is slidably mounted on the first connecting rod (3); A brush ring (5) is sleeved on the end of the tapping end of the tap body (1) and is connected to the second connecting rod (4), and its inner ring is provided with bristles that press against the side wall of the tapping end of the tap body (1); an elastic member (6) for pushing the first connecting rod (3) and the second connecting rod (4) to unfold; the first mounting ring (2) comprises a connecting ring (21) rotatably mounted on the tap body (1) and an annular oil tank (22) coaxially arranged on the outer wall of the connecting ring (21); the first connecting rod (3) is arranged on the oil tank (22); the first connecting rod (3) and the second connecting rod (4) are both tubular; the first connecting rod (3) is connected to the oil tank (22); the second connecting rod (4) is slidably sleeved on the first connecting rod (3) and the oil tank (22); a connecting rod (3), the second connecting rod (4) being provided with an oil outlet pipe (41), the oil outlet pipe (41) being used for dripping oil on the bristles of the brush ring (5); a sealing plug (31) being provided at one end of the first connecting rod (3) located inside the second connecting rod (4), the sealing plug (31) being sealingly slidably installed inside the second connecting rod (4); an air inlet pipe (23) being provided on one side of the oil tank (22) facing the connecting end of the tap body (1) and the machine tool tool holder, the air inlet pipe (23) being in communication with the oil tank (22), the air inlet pipe (23) being in communication with the oil tank (22), the air inlet pipe (23) being provided with a sealing plug (31 ... The inner diameter of the air inlet end of the air inlet pipe (23) is smaller than the inner diameter of the air inlet pipe (23); a plurality of first baffles (231) are provided in the air inlet pipe (23); a first sealing ball (232) is provided in the air inlet pipe (23) between the first baffles (231) and the air inlet end of the air inlet pipe (23); the outer diameter of the first sealing ball (232) is larger than the inner diameter of the air inlet end of the air inlet pipe (23) and smaller than the inner diameter of the air inlet pipe (23); the first sealing ball (232) can slide to seal the air inlet end of the air inlet pipe (23); the outlet The inner diameter of the oil inlet end of the oil pipe (41) is smaller than the inner diameter of the oil outlet pipe (41); a plurality of second baffles (411) are provided on the inner wall of the oil outlet pipe (41); a second sealing ball (412) is provided in the oil outlet pipe (41) between the second baffles (411) and the oil inlet end of the oil outlet pipe (41); the outer diameter of the second sealing ball (412) is larger than the inner diameter of the oil inlet end of the oil outlet pipe (41) and smaller than the inner diameter of the oil outlet pipe (41); the second sealing ball (412) can slide to seal the oil inlet end of the oil outlet pipe (41).

2. A machine tap according to claim 1, characterized in that: A retaining spring (413) is provided between the second sealing ball (412) and the second baffle (411), and the retaining spring (413) pushes the second sealing ball (412) to press against the inner wall of the oil inlet end of the oil outlet pipe (41).

3. A machine tap according to claim 1, characterized in that: The end of the first connecting rod (3) is in a closed shape; an oil outlet hole (33) is provided on a side wall of one end of the first connecting rod (3) located inside the second connecting rod (4); the sealing plug (31) is slidably mounted on the first connecting rod (3); an adjusting sleeve (32) is threadedly mounted on the first connecting rod (3); the adjusting sleeve (32) is connected to the sealing plug (31); and the adjusting sleeve (32) can be rotated to the sealing plug (31) to seal the oil outlet hole (33).

4. A machine tap according to claim 3, characterized in that: The adjustment sleeve (32) is slidably engaged with the inner hole of the second connecting rod (4).

5. A machine tap according to claim 1, characterized in that: A mounting rod (7) is provided on the outer side wall of the second connecting rod (4), the mounting rod (7) and the first mounting ring (2) are slidably engaged with each other, a sealing plate (71) is provided at one end of the mounting rod (7), and the sealing plate (71) is provided with a rubber layer (72), and when the first connecting rod (3) and the second connecting rod (4) are unfolded, the rubber layer (72) presses against the air intake end of the air intake pipe (23) to seal the air intake end.

6. A machine tap according to claim 1, characterized in that: The brush ring (5) comprises a second mounting ring (51) and an annular brush (52); the second mounting ring (51) is connected to the end of the second connecting rod (4); and the brush (52) is mounted on the second mounting ring (51) by means of bolts.

7. A machine tap according to claim 6, characterized in that: A friction ring (53) is provided on the end surface of the brush (52) facing away from the second mounting ring (51); the friction ring (53) is provided with a connecting column (531); the connecting column (531) is inserted into a hole of the brush (52) for mounting a bolt.

8. A machine tap according to claim 6, characterized in that: The end of the oil outlet pipe (41) is bent along the brush (52), the bent ends of the oil outlet pipe (41) are connected end to end to form a ring, and a plurality of oil outlets (414) are provided on the side wall of the bent end of the oil outlet pipe (41).

Images