Hydraulic cutter handle of precision lathe

Abstract

The invention discloses a hydraulic cutter handle of a precision automatic lathe. The hydraulic cutter handle comprises a cutter bar, a clamping sleeve and an adjusting assembly. A pressure relief hole and a locking hole are formed in the cutter bar, the pressure relief hole extends to the first end face of the cutter bar in the axial direction of the cutter bar, threads are arranged on the inner wall of the locking hole, the locking hole penetrates through the pressure relief hole, and an acute angle or a right-angle included angle is formed between the locking hole and the axial direction of the cutter bar. The clamping sleeve is an elastic piece and is embedded in the pressure relief hole, a gap is reserved between the clamping sleeve and the inner wall face of the pressure relief hole, and the gap is communicated with the locking hole. The adjusting assembly comprises an adjusting screw, and the adjusting screw is in threaded connection with the locking hole; the occupied space of a machine tool can be reduced, the clamping sleeve is hydraulically driven to press the tool, and the centering clamping precision of the tool can be kept; the pressure of the hydraulic oil is adjusted through the adjusting screw, so that the hydraulic pressure can be finely adjusted, and the clamping force of the cutter is adjusted.

Description

Technical Field

[0001] The invention relates to the technical field of machine tools, in particular to a hydraulic tool handle for a Swiss-type lathe. Background Art

[0002] Whether it is a CNC machining center or a traditional machine tool, cutting tools are an indispensable part. As the part of the machine tool that directly contacts the workpiece and performs actual cutting work on the workpiece, cutting tools are prone to wear and tear; and there are many types of cutting tools for different workpieces and processing requirements, and cutting tools often need to be replaced. Therefore, in order to facilitate the installation and removal of cutting tools, corresponding cutting tool fixing devices are generally installed on the machine tool spindle to fix the cutting tools during normal use and enable the cutting tools to be quickly removed when they need to be installed or removed.

[0003] At present, most tool fixing devices use collets and side screws to fix the tool. The collet is squeezed by the conical surface of the nut and the conical surface of the collet, so that the gap and diameter of the collet are reduced to clamp the tool. In the side screw fixing method, the machine tool spindle is provided with a channel for inserting the tool handle, and a threaded hole is opened on one side of the channel. The side screw is threadedly connected to the threaded hole. In the process of tightening the side screw, the end of the side screw approaches the tool handle and finally presses the tool handle to lock the tool in the channel.

[0004] The collet structure has the advantage of keeping the tool centered, but the disadvantages are that the clamping accuracy is not good enough and it takes a long time to replace the tool. The side screw fixing structure is a relatively compact structure, but its disadvantage is that the side screw will deviate the tool, making it difficult to set the tool in the center of the spindle. In a rotary spindle, the tool will rotate eccentrically, affecting the processing accuracy. Therefore, a device with a compact structure that can keep the tool centered and fixed is needed to improve the installation accuracy of the tool. Summary of the invention

[0005] In order to solve the problems existing in the tool fixing device in the lathe mentioned in the above background technology, the present invention provides a hydraulic tool holder for a Swiss-type lathe. The technical solution adopted by the present invention is as follows:

[0006] A hydraulic tool handle for a Swiss-type lathe, comprising a tool rod, a jacket and an adjustment assembly; a pressure relief hole and a locking hole are provided in the tool rod, the pressure relief hole extends along the axial direction of the tool rod to the first end face of the tool rod, the inner wall of the locking hole is provided with a thread, the locking hole passes through the pressure relief hole, and the locking hole forms an acute angle or a right angle with the axial direction of the tool rod; the jacket is an elastic member and is nested in the pressure relief hole, a gap is left between the jacket and the inner wall surface of the pressure relief hole, and the gap is connected to the locking hole; the adjustment assembly comprises an adjusting screw, and the adjusting screw is threadedly connected to the locking hole.

[0007] Furthermore, the locking hole forms an acute angle with the axial direction of the knife rod, the end of the locking hole close to the pressure relief hole is the first end, the end of the locking hole away from the pressure relief hole is the second end, and the second end of the locking hole is closer to the first end face of the knife rod than the first end.

[0008] Furthermore, a clamping hole is provided inside the knife rod, the pressure relief hole is connected to the clamping hole, the clamping hole passes through to the second end face of the knife rod, and the inner diameter of the pressure relief hole is larger than the inner diameter of the clamping hole.

[0009] Furthermore, a high-pressure cooling connection thread and a fixed-length screw are provided in the clamping hole near the second end surface, and the high-pressure cooling connection thread is provided at the opening of the second end surface of the clamping hole.

[0010] Furthermore, an annular groove is arranged on the outer side of the jacket, and each of the annular grooves is connected to each other through the above-mentioned gap.

[0011] Furthermore, the adjustment assembly includes a piston, a steel column and an adjustment screw. The piston is an elastic member and is slidably installed in the locking hole. The steel column is slidably installed in the locking hole and is arranged between the adjustment screw and the piston.

[0012] Furthermore, an oil drain hole is provided in the tool rod, the oil drain hole passes through the pressure relief hole and is connected to the gap, and the inner wall of the oil drain hole is provided with a thread; the Swiss machine hydraulic tool handle also includes an oil stop screw, and the oil stop screw is threadedly connected to the oil drain hole.

[0013] Furthermore, the oil drain hole includes a connected through hole section and a threaded hole section, the inner diameter of the through hole section is smaller than the inner diameter of the threaded hole section, and the oil stop screw is threadedly connected to the threaded hole section; the Swiss machine hydraulic tool handle also includes an oil stop steel ball, the outer diameter of the oil stop steel ball is larger than the inner diameter of the through hole section and smaller than the inner diameter of the threaded hole section, and the oil stop steel ball stops at the opening of the through hole section.

[0014] The beneficial effects of the hydraulic tool holder of a Swiss-type lathe of the present invention include at least: the tool bar structure in the present application is compact, which can reduce the space occupied by the machine tool, and the centering clamping accuracy of the tool can be maintained by pressing the clamping sleeve toward the tool through the hydraulic drive; the hydraulic oil pressure is adjusted by adjusting the screw, so that the hydraulic size can be fine-tuned to adjust the clamping force of the tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A three-dimensional diagram of a hydraulic tool handle of a Swiss-type lathe according to the present invention;

[0016] Figure 2 It is a front cross-sectional view of the present invention;

[0017] Figure 3 It is a partial front cross-sectional view of the present invention without the adjustment component and the oil stop component;

[0018] Among them, 1. tool rod; 2. clamping hole; 3. locking hole; 4. oil drain hole; 5. jacket; 6. pressure relief hole; 101. high-pressure cooling connection thread; 102. fixed-length screw; 301. adjusting screw; 302. steel column; 303. piston; 401. through hole section; 402. threaded hole section; 403. oil-stop steel ball; 404. oil-stop screw; 501. annular groove. DETAILED DESCRIPTION

[0019] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] like Figure 1-3 As shown, a hydraulic tool handle for a Swiss-type lathe comprises a tool bar 1, a jacket 5 and an adjustment assembly; a pressure relief hole 6 and a locking hole 3 are provided in the tool bar 1, the pressure relief hole 6 extends along the axial direction of the tool bar 1 to the first end face of the tool bar 1, the inner wall of the locking hole 3 is provided with a thread, the locking hole 3 passes through the pressure relief hole 6, and the locking hole 3 forms an acute angle or a right angle with the axial direction of the tool bar 1; the jacket 5 is an elastic member and is nested in the pressure relief hole 6, a gap is left between the jacket 5 and the inner wall surface of the pressure relief hole 6, and the gap is connected to the locking hole 3; the adjustment assembly comprises an adjustment screw 301, and the adjustment screw 301 is threadedly connected to the locking hole 3. The gap and the locking hole 3 are used to contain hydraulic oil, the handle of the tool can be inserted into the jacket 5 from the first end face of the tool bar 1, and the hydraulic pressure of the hydraulic oil can be adjusted by screwing the adjustment screw 301.

[0021] The locking hole 3 forms an acute angle with the axial direction of the knife rod 1, the end of the locking hole 3 close to the pressure relief hole 6 is the first end, the end of the locking hole 3 away from the pressure relief hole 6 is the second end, and the second end of the locking hole 3 is closer to the first end face of the knife rod 1 than the first end.

[0022] A clamping hole 2 is also provided inside the tool rod 1, and the pressure relief hole 6 is connected to the clamping hole 2. The clamping hole 2 passes through the second end face of the tool rod 1, and the inner diameter of the pressure relief hole 6 is larger than the inner diameter of the clamping hole 2; the pressure relief hole 6 is used to reduce the air pressure in the clamping hole 2 when clamping the tool.

[0023] A high-pressure cooling connecting thread 101 and a fixed-length screw 102 are provided in the clamping hole 2 near the second end face, and the high-pressure cooling connecting thread 101 is provided at the opening of the second end face of the clamping hole 2; the fixed-length screw 102 can be screwed by the hexagon socket at the front end of the hollow fixed-length screw 102, so that the position of the fixed-length screw 102 in the clamping hole 2 can be adjusted to adapt to tool handles of different lengths, and when the tool is replaced next time, it is only necessary to press the end face of the tool handle against the hexagon socket end face of the fixed-length screw 102 to ensure that the tool length is consistent; the high-pressure cooling connecting thread 101 is threadedly connected to the external high-pressure cooling pipe, so that the high-pressure coolant can be introduced into the tool rod 1, and enter the cooling hole inside the tool through the middle through hole of the tool rod 1 to cool the tool and remove chips.

[0024] An annular groove 501 is disposed on the outer side of the jacket 5 , and each of the annular grooves 501 is connected to each other through the above-mentioned gap.

[0025] The adjustment assembly includes a piston 303, a steel column 302 and an adjustment screw 301. The piston 303 is an elastic member and is slidably installed in the locking hole 3. The steel column 302 is slidably installed in the locking hole 3 and is arranged between the adjustment screw 301 and the piston 303. The piston 303 can block the locking hole 3, and the adjustment screw 301 drives the piston 303 to move.

[0026] An oil drain hole 4 is also provided in the tool rod 1, and the oil drain hole 4 passes through the pressure relief hole 6 and is connected to the gap. The inner wall of the oil drain hole 4 is provided with a thread; the Swiss machine hydraulic tool handle also includes an oil stop screw 404, and the oil stop screw 404 is threadedly connected to the oil drain hole 4.

[0027] The oil drain hole 4 includes a connected through hole section 401 and a threaded hole section 402, the inner diameter of the through hole section 401 is smaller than the inner diameter of the threaded hole section 402, and the oil stop screw 404 is threadedly connected to the threaded hole section 402; the Swiss machine hydraulic tool handle also includes an oil stop steel ball 403, the outer diameter of the oil stop steel ball 403 is larger than the inner diameter of the through hole section 401 and smaller than the inner diameter of the threaded hole section 402, the oil stop steel ball 403 is stopped at the opening of the through hole section 401, and the end of the oil stop screw 404 is in contact with the oil stop steel ball 403.

[0028] The embodiment is as follows: when the tool needs to be clamped, the shank of the tool is inserted from the first end face of the tool bar 1 and enters the jacket 5; then the adjusting screw 301 is tightened, and the transmission piston 303 moves toward the end of the jacket 5 to increase the hydraulic pressure of the hydraulic oil. By increasing the hydraulic pressure of the hydraulic oil, the jacket 5 is close to the surface of the tool and exerts a force to clamp the tool. Moreover, since the jacket 5 is uniformly expanded, the force acting on the tool is uniform, the center position of the tool is maintained, the eccentricity is reduced, and the processing accuracy is improved; when the tool is clamped, the air can be discharged to the outside from the pressure relief hole 6 to reduce the air pressure in the clamping hole 2. When the hydraulic oil needs to be replaced or supplemented, the oil stop screw 404 is loosened and the oil stop steel ball 403 is removed therefrom, so that the internal hydraulic oil flows out from the oil drain hole 4, and the newly supplemented hydraulic oil can also be supplemented to the inside of the tool bar 1 through the oil drain hole 4. By using the adjusting screw 301 to increase the hydraulic pressure of the hydraulic oil, the sleeve 5 is close to the surface of the tool and exerts a force to clamp the tool, which solves the problem mentioned in the background technology that "the side fixing screw will deflect the tool, making it difficult to set the tool in the center of the spindle, and the tool rotation in the rotary spindle will be eccentric, affecting the processing accuracy."

[0029] The present invention and its embodiments are described above, which is not restrictive. What is shown in the accompanying drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and do not deviate from the purpose of the invention, they can creatively design structural methods and embodiments similar to the technical scheme, which should all fall within the scope of protection of the present invention.

Claims

1. A hydraulic tool handle for a Swiss-type lathe, characterized by: The invention comprises a knife bar (1), a jacket (5) and an adjusting component; the knife bar (1) is provided with a pressure relief hole (6) and a locking hole (3); the pressure relief hole (6) extends along the axial direction of the knife bar (1) to the first end face of the knife bar (1); the inner wall of the locking hole (3) is provided with a thread; the locking hole (3) passes through the pressure relief hole (6); the locking hole (3) forms an acute angle or a right angle with the axial direction of the knife bar (1); the jacket (5) is an elastic member and is nested in the pressure relief hole (6); a gap is left between the jacket (5) and the inner wall surface of the pressure relief hole (6); the gap is connected with the locking hole (3); the adjusting component comprises an adjusting screw (301); the adjusting screw (301) is threadedly connected with the locking hole (3).

2. The hydraulic tool handle of a Swiss-type lathe according to claim 1, characterized in that: The locking hole (3) forms an acute angle with the axial direction of the knife rod (1); the end of the locking hole (3) close to the pressure relief hole (6) is the first end, and the end of the locking hole (3) away from the pressure relief hole (6) is the second end; the second end of the locking hole (3) is closer to the first end surface of the knife rod (1) than the first end.

3. The hydraulic tool handle of a Swiss-type lathe according to claim 1, characterized in that: The knife rod (1) is also provided with a clamping hole (2), the pressure relief hole (6) is connected to the clamping hole (2), the clamping hole (2) passes through to the second end face of the knife rod (1), and the inner diameter of the pressure relief hole (6) is larger than the inner diameter of the clamping hole (2).

4. The hydraulic tool handle of a Swiss-type lathe according to claim 1, characterized in that: A high-pressure cooling connection thread (101) and a fixed-length screw (102) are provided in the clamping hole (2) near the second end surface, and the high-pressure cooling connection thread (101) is provided at the opening of the second end surface of the clamping hole (2).

5. The hydraulic tool handle of a Swiss-type lathe according to claim 1, characterized in that: An annular groove (501) is provided on the outer side of the jacket (5), and the annular grooves (501) are connected to each other via the above-mentioned gap.

6. The hydraulic tool handle of a Swiss-type lathe according to claim 1, characterized in that: The adjustment assembly comprises a piston (303), a steel column (302) and an adjustment screw (301); the piston (303) is an elastic member and is slidably installed in the locking hole (3); the steel column (302) is slidably installed in the locking hole (3) and is arranged between the adjustment screw (301) and the piston (303).

7. A Swiss-type lathe hydraulic tool handle according to any one of claims 1 to 6, characterized in that: The tool rod (1) is also provided with an oil drain hole (4), the oil drain hole (4) is connected to the pressure relief hole (6) and is in communication with the gap, and the inner wall of the oil drain hole (4) is provided with a thread; the Swiss machine hydraulic tool handle also includes an oil stop screw (404), and the oil stop screw (404) is threadedly connected to the oil drain hole (4).

8. The hydraulic tool handle of a Swiss-type lathe according to claim 7, characterized in that: The oil drain hole (4) comprises a through hole section (401) and a threaded hole section (402) connected to each other, the inner diameter of the through hole section (401) is smaller than the inner diameter of the threaded hole section (402), and the oil stop screw (404) is threadedly connected to the threaded hole section (402); the Swiss machine hydraulic tool handle also comprises an oil stop steel ball (403), the outer diameter of the oil stop steel ball (403) is larger than the inner diameter of the through hole section (401) and smaller than the inner diameter of the threaded hole section (402), and the oil stop steel ball (403) is stopped at the opening of the through hole section (401).

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