Thread milling cutter with replaceable cutter head

Abstract

The utility model relates to the field of thread milling cutters, in particular to a tool bit replaceable thread milling cutter which comprises a milling cutter body and a cutter bar, a heat insulation plate is fixedly connected to the top end of the milling cutter body, and a first connector is inserted into a containing groove in the cutter bar; the chamfer at the top end of the first connector extrudes the inserting rod to enable the inserting rod to horizontally move outwards along the cutter bar, then the first spring is compressed until the first inserting groove and the corresponding inserting rod are located on the same central axis, and in the process, the elastic clamping plate makes contact with the corresponding fixing column and is opened till the first connector completely enters the cutter bar. At the moment, the first springs and the elastic clamping plates can be reset under the action of resilience force, the first springs push the corresponding inserting rods to be inserted into the inserting grooves, and the elastic clamping plates can be clamped to the corresponding fixing columns under the action of resilience force; and therefore, the effect that the milling cutter can be quickly disassembled and assembled through mutual cooperation of an elastic clamping plate and a first spring is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of thread milling cutters, in particular to a thread milling cutter with a replaceable cutter head. Background Art

[0002] A milling cutter is a rotating tool with one or more teeth used for milling. Each tooth sequentially and intermittently removes the workpiece's excess material. Milling cutters are primarily used on milling machines to machine flat surfaces, steps, grooves, formed surfaces, and cut-offs. Spiral milling cutters are used for machining flat surfaces on horizontal milling machines. The teeth are distributed around the cutter's circumference and are categorized by tooth shape: straight or helical. The number of teeth is categorized by coarse or fine.

[0003] After searching, a Chinese patent with publication number CN217253136U discloses a thread milling cutter with a replaceable cutter head. It solves the problem that the cutter head and the cutter rod of a general spiral milling cutter are integrated. When one of the cutter head or the cutter rod is damaged, it often needs to be replaced as a whole, which increases the cost of use and causes waste. In addition, there is a lack of positioning reference during installation, which affects the installation efficiency.

[0004] However, this device requires the use of bolts to fix the milling cutter. The fixation with bolts will generate heat due to friction during the long-term use of the milling cutter, causing the bolts to expand, making it difficult to remove the bolts, or causing the bolts to break inside the arbor, which can easily lead to damage to both the arbor and the milling cutter.

[0005] Therefore, a new solution needs to be proposed to solve this problem. Utility Model Content

[0006] In view of the above background technology, the existing technology has the problem that the milling cutter cannot be quickly disassembled and assembled.

[0007] The utility model discloses a thread milling cutter with replaceable cutter head, including a milling cutter body and a cutter rod, the top of the milling cutter body is fixedly connected to a heat insulation plate, the outer surface of the heat insulation plate is fixedly connected to four fixing columns, the outer surface of the cutter rod is fixedly connected to four elastic clips, the outer surface of each elastic clip is clamped with the corresponding fixing column, the upper surface of the heat insulation plate is fixedly connected to a first connecting head, the four side surfaces of the first connecting head are provided with a first slot, the inner wall of each of the first slots is plugged with an insertion rod, the outer surface of each of the insertion rods is sleeved with a first spring, each of the first springs is fixedly connected to the corresponding insertion rod at one end close to the first connecting head, and the other end is fixedly connected to the cutter rod, and each of the insertion rods is fixedly connected to a pull block at one end away from the first connecting head.

[0008] Furthermore, the outer surface of the milling cutter body is provided with four chip removal grooves, and the outer surface of each chip removal groove is provided with a heat dissipation groove.

[0009] Furthermore, a square groove is provided on the upper surface of the first connector, and a square plug-in is inserted into the inner wall of the square groove.

[0010] Furthermore, a second connector is fixedly connected to the upper surface of the knife rod, a placement groove and a sliding groove are provided inside the knife rod, and an outer surface of the first connector is plugged into the placement groove.

[0011] Furthermore, a square connecting rod is fixedly connected to the top of the square plug-in, and the outer surface of the square connecting rod is slidably connected to the sliding groove.

[0012] Furthermore, a second spring is provided inside the knife rod, and the second spring is sleeved on the square connecting rod.

[0013] Furthermore, the top end of the second spring is fixedly connected to the knife rod, and the bottom end of the second spring is fixedly connected to the square plug-in.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] 1. The utility model is provided with a milling cutter body, a cutter rod, a heat insulation plate, a fixing column, an elastic card plate, a first connecting head, a first slot, an insertion rod, a first spring, a pull block and other components, and the first connecting head is inserted into the placement groove in the cutter rod. During this process, the chamfer at the top of the first connecting head will squeeze the insertion rod so that it moves horizontally outward along the cutter rod, and then the first spring will be compressed until the first slot and the corresponding insertion rod are on the same central axis. During this process, the elastic card plate will contact and open with the corresponding fixing column until the first connecting head is fully inserted. At this time, the first spring and the elastic card plate will reset under the action of their rebound force, and the first spring will push the corresponding insertion rod to be inserted into the slot. The elastic card plate will be clamped on the corresponding fixing column under the action of its rebound force, thereby achieving the effect that the device can quickly disassemble and assemble the milling cutter through the mutual cooperation of the elastic card plate and the first spring.

[0016] 2. The utility model provides a square groove, a square plug-in, a square connecting rod, a second spring and other components. By inserting the first connecting head, the square plug-in will be inserted into the square groove, and then the first connecting head will be continuously inserted. The square connecting rod and the square plug-in will continue to slide vertically upward along the slide groove. At this time, the second spring will be compressed. Then, during the disassembly of the milling cutter, when the milling cutter is not subjected to external force, the second spring will push the milling cutter to pop out of the cutter rod under the action of its rebound force. The setting of the square plug-in and the square connecting rod can strengthen the connection between the milling cutter and the cutter rod, thereby achieving the effect that the device can facilitate the disassembly of the milling cutter through the setting of the second spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0018] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the elastic card structure of the utility model;

[0020] Figure 3 This is a schematic diagram of the internal structure of the tool bar of the utility model;

[0021] Figure 4 This is a schematic structural diagram of the first connector of the present utility model.

[0022] In the figure: 1. Milling cutter body; 2. Chip groove; 3. Heat shield; 4. Fixed column; 5. Cutter bar; 6. Elastic clamp; 7. Second connector; 8. First connector; 9. First slot; 10. Square slot; 11. Insert rod; 12. First spring; 13. Pull block; 14. Square connecting rod; 15. Square plug-in; 16. Second spring; 17. Heat sink. DETAILED DESCRIPTION

[0023] The following diagrams illustrate various embodiments of the present invention. For clarity, many physical details will be included in the following description. However, it should be understood that these physical details are not intended to limit the present invention. In other words, in some embodiments of the present invention, these physical details are not essential. Furthermore, to simplify the illustrations, some commonly used structures and components are depicted in a simplified schematic manner.

[0024] See also Figure 1 - Figure 4When the heat insulating plate 3 is in the working state, the heat insulating plate 3 is fixed to the top of the heat insulating plate 3 and the heat insulating plate 3 is fixed to the outer surface of the heat insulating plate 3. The heat insulating plate 3 can block the heat generated by the heat insulating plate 3 during use and reduce the heat transfer to the heat insulating plate 5. The outer surface of the heat insulating plate 3 is fixedly connected to four fixing columns 4. The fixing columns 4 are evenly arranged on the outer surface of the heat insulating plate 3, and a slot is opened inside each fixing column 4. The outer surface of the cutter bar 5 is fixedly connected to four elastic clips 6. The elastic clips 6 are evenly arranged on the outer side of the cutter bar 5, and the size of each elastic clip 6 is the same as the size of the slot. The outer surface of each elastic clip 6 is clamped with the corresponding fixing column 4. During the installation of the milling cutter body 1, the elastic clips 6 will be inserted into the corresponding slot. During this process, the elastic clips 6 will be squeezed and stretched until the heat insulating plate 3 contacts the cutter bar 5. At this time, the elastic clips 6 will be reset and clamped on the corresponding fixing column 4, so that the milling cutter body 1 can be preliminarily fixed.

[0025] In a preferred embodiment, the upper surface of the heat insulation board 3 is fixedly connected to the first connector 8, and the four sides of the first connector 8 are provided with first slots 9, and the first connector 8 can be inserted into the knife rod 5. The first slots 9 are evenly arranged in the four directions of the first connector 8. The inner wall of each first slot 9 is plugged with an insertion rod 11, and the first connector 8 can be fixed by plugging the insertion rod 11 into the corresponding first slot 9. The outer surface of each insertion rod 11 is sleeved with a first spring 12, and each insertion rod 11 is placed horizontally. The end of each first spring 12 close to the first connector 8 is fixedly connected to the corresponding insertion rod 11, and the upper surface of the first connector 8 has an inverted bevel.

[0026] In this embodiment, the other end is fixedly connected to the tool rod 5, and the end of each insertion rod 11 away from the first connecting head 8 is fixedly connected to the pull block 13. Specifically, by inserting the first connecting head 8 into the tool rod 5, the chamfered part on the first connecting head 8 will contact and squeeze the insertion rod 11. During the continuous installation process, the insertion rod 11 will be squeezed and the first spring 12 will be compressed until the first connecting head 8 is fully inserted. At this time, the first slot 9 will be on the same central axis as the corresponding insertion rod 11, and then the first spring 12 will push the corresponding insertion rod 11 into the corresponding first slot 9 under the action of its rebound force, so that the milling cutter can be quickly fixed.

[0027] In this embodiment, four chip grooves 2 are provided on the outer surface of the milling cutter body 1, and a heat dissipation groove 17 is provided on the outer surface of each chip groove 2. Specifically, the chip groove 2 can discharge the chips when the milling cutter is working, and the heat dissipation groove 17 can dissipate the heat of the working milling cutter.

[0028] In this embodiment, a square groove 10 is provided on the upper surface of the first connector 8, and a square plug-in 15 is inserted into the inner wall of the square groove 10. Specifically, during the installation of the first connector 8, the square plug-in 15 will be inserted into the square groove 10, and the connection between the two can be increased through the square connection.

[0029] In this embodiment, the upper surface of the tool rod 5 is fixedly connected to a second connecting head 7, which can connect the tool rod 5 to the machine tool. A placement groove and a slide groove are provided inside the tool rod 5, and the slide groove is arranged above the placement groove. The outer surface of the first connecting head 8 is plugged into the placement groove. Specifically, during the installation of the first connecting head 8, the first connecting head 8 will enter the placement groove inside the tool rod 5.

[0030] In this embodiment, the top of the square plug-in 15 is fixedly connected to the square connecting rod 14, and the outer surface of the square connecting rod 14 is slidably connected to the slide groove. Specifically, during the installation of the first connecting head 8, the square plug-in 15 will be squeezed, and then it will push the square connecting rod 14 to slide vertically upward along the slide groove.

[0031] In a preferred embodiment, a second spring 16 is provided inside the tool rod 5, and the second spring 16 is sleeved on the square connecting rod 14. The top end of the second spring 16 is fixedly connected to the tool rod 5, and the bottom end of the second spring 16 is fixedly connected to the square plug-in 15. Specifically, when the square connecting rod 14 slides vertically upward along the slide groove, the second spring 16 will be compressed. Then, in the process of disassembling the milling cutter, it is necessary to first use a tool to push the pull block 13 so that the pull block 13 drives the corresponding plug-in rod 11 to leave the corresponding first slot 9, and then use a tool to open the elastic clip 6. At this time, the second spring 16 will push the milling cutter body 1 to pop out under the action of its rebound force, so as to facilitate the quick replacement of the milling cutter.

[0032] The above is merely an embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of the claims of the present invention.

Claims

1. A thread milling cutter with a replaceable cutter head, comprising a cutter body (1) and a cutter bar (5), characterized in that: The top of the milling cutter body (1) is fixedly connected to a heat insulation plate (3), the outer surface of the heat insulation plate (3) is fixedly connected to four fixed columns (4), the outer surface of the tool rod (5) is fixedly connected to four elastic clamps (6), the outer surface of each elastic clamp (6) is clamped with the corresponding fixed column (4), the upper surface of the heat insulation plate (3) is fixedly connected to a first connecting head (8), the four sides of the first connecting head (8) are provided with a first slot (9), the inner wall of each first slot (9) is plugged with an insertion rod (11), the outer surface of each insertion rod (11) is sleeved with a first spring (12), the end of each first spring (12) close to the first connecting head (8) is fixedly connected to the corresponding insertion rod (11), and the other end is fixedly connected to the tool rod (5), and the end of each insertion rod (11) away from the first connecting head (8) is fixedly connected to a pull block (13).

2. The thread milling cutter with replaceable cutter head according to claim 1, characterized in that: Four chip removal grooves (2) are provided on the outer surface of the milling cutter body (1), and a heat dissipation groove (17) is provided on the outer surface of each chip removal groove (2).

3. The thread milling cutter with replaceable cutter head according to claim 1, characterized in that: A square groove (10) is provided on the upper surface of the first connector (8), and a square plug-in unit (15) is inserted into the inner wall of the square groove (10).

4. The thread milling cutter with replaceable cutter head according to claim 1, characterized in that: The upper surface of the knife rod (5) is fixedly connected with a second connector (7), the interior of the knife rod (5) is provided with a placement groove and a sliding groove, and the outer surface of the first connector (8) is plugged into the placement groove.

5. The thread milling cutter with replaceable cutter head according to claim 3, characterized in that: The top end of the square plug-in unit (15) is fixedly connected to a square connecting rod (14), and the outer surface of the square connecting rod (14) is slidably connected to the sliding groove.

6. The thread milling cutter with replaceable cutter head according to claim 5, characterized in that: A second spring (16) is provided inside the knife rod (5), and the second spring (16) is sleeved on the square connecting rod (14).

7. The thread milling cutter with replaceable cutter head according to claim 6, characterized in that: The top end of the second spring (16) is fixedly connected to the knife rod (5), and the bottom end of the second spring (16) is fixedly connected to the square plug-in (15).

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