Thermal shrinkage knife handle

Abstract

The utility model belongs to the technical field of machine tool machining, and discloses a thermal shrinkage cutter handle. The thermal shrinkage cutter handle comprises a cutter handle body and a positioning piece, the cutter handle body is provided with a connecting section, a first cone section, a transition section and a second cone section which are sequentially arranged in the first direction, the connecting section is used for being connected with a machine tool, and the second cone section is provided with an inner hole used for clamping a cutter; the transition section is provided with a smooth transition curved surface, the transition curved surface is bent in the axis direction away from the thermal shrinkage cutter handle, the small-diameter end of the first cone section is connected with the large-diameter end of the second cone section through the transition curved surface, and the outer diameter of the small-diameter end of the first cone section is larger than that of the large-diameter end of the second cone section. The first cone section is provided with a positioning hole, the positioning hole extends in the first direction and communicates with the inner hole, the positioning piece is adjustably arranged in the positioning hole in the first direction, and the positioning piece is used for abutting against the end of the tool. The thermal shrinkage cutter handle can effectively reduce attachment of scraps so as to achieve stable high-speed rotation, and therefore the requirement for the machining precision of a workpiece is met.

Description

Technical Field

[0001] The utility model relates to the technical field of machine tool processing, in particular to a heat shrinkable tool handle. Background Art

[0002] The heat shrinkable tool holder is a tool-carrying component commonly used in the field of machine tool processing. Its principle is to use the difference in thermal expansion coefficients between the tool holder and the tool to clamp the tool strongly and with high precision, so that the tool can still maintain high reliability when rotating at high speed.

[0003] When the commonly used heat shrink tool holder rotates at ultra-high speed to drive the tool to cut, the adhesion of iron chips during cutting or the wear caused by long-term use will destroy the dynamic balance of the tool holder, causing unstable rotation of the tool and resulting in insufficient processing accuracy. Utility Model Content

[0004] The utility model aims to provide a heat shrinkable tool handle which can ensure a dynamic balance state during high-speed rotation to ensure machining accuracy.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides a heat shrinkable tool handle, comprising:

[0007] A tool handle body, the tool handle body having a connecting section, a first cone section, a transition section and a second cone section arranged in sequence along a first direction, the connecting section is used to connect to a machine tool, and the second cone section has an inner hole for clamping a tool;

[0008] The transition section has a smooth transition curved surface, the transition curved surface is bent in a direction away from the axis of the heat shrinkable tool handle, the small diameter end of the first cone section is connected to the large diameter end of the second cone section through the transition curved surface, and the outer diameter of the small diameter end of the first cone section is larger than the large diameter end of the second cone section;

[0009] The first cone section has a positioning hole, the positioning hole extends along the first direction and is connected to the inner hole, the positioning member is adjustably arranged in the positioning hole along the first direction, and the positioning member is used to abut against the end of the tool.

[0010] Preferably, the first cone section has a cooling channel, the cooling channel is communicated with the inner hole, and the cooling channel is used for circulating a cooling liquid.

[0011] Preferably, the positioning member is a top screw, and the positioning member is threadedly connected to the positioning hole.

[0012] Preferably, the first cone section has a cooling channel for circulating cooling liquid, and the positioning member is provided with a through hole extending along the first direction, and the through hole is communicated with the cooling channel.

[0013] Preferably, at least three balancing screws are arranged at equal intervals in the circumferential direction on the same circumferential surface of the first cone segment, and the balancing screws are threadedly connected to the first cone segment.

[0014] Preferably, a plurality of containing grooves are arranged in the inner hole along the first direction, and the containing grooves are used to contain impurities.

[0015] The beneficial effects of the utility model are:

[0016] The utility model provides a heat shrinkable tool handle, in which a tool handle body is sequentially provided with a connecting section, a first cone section, a transition section and a second cone section along a first direction. Since the connecting section is connected to a machine tool and the second cone section has an inner hole capable of clamping a tool, the heat shrinkable tool handle can be connected to the machine tool as a whole and clamp the tool for normal cutting operations. Since the transition section has a smooth transition curved surface, the small diameter end of the first cone section is connected to the large diameter end of the second cone section via the transition curved surface, the transition curved surface is bent in a direction away from the axis of the heat shrinkable tool handle, and the outer diameter of the small diameter end of the first cone section is larger than the large diameter end of the second cone section. Therefore, the outer diameter of the transition curved surface gradually decreases along the first direction, and the debris generated in the process of the tool cutting the workpiece is moved to the The upward splash will be blocked by the transition surface, and compared with the flat surface, the transition surface can reduce the contact area with the debris, thereby reducing the friction between the debris and the transition surface, avoiding the debris adhering to the tool holder body and destroying the dynamic balance of the heat shrink tool holder, so as to achieve high-speed and stable rotation, thereby effectively ensuring the processing quality of the workpiece; since the first cone section has a positioning hole connected to the inner hole, the positioning piece is adjustably arranged in the positioning hole along the first direction, and the positioning piece can abut against the end of the tool, so the position of the positioning piece can be adjusted to achieve rapid installation and positioning of tools of different lengths, so as to ensure that the length of the tool extending out of the heat shrink tool holder is consistent, thereby ensuring the processing accuracy requirements for the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a cross-sectional view of a heat shrinkable tool handle provided by a specific implementation manner of the utility model.

[0018] In the figure:

[0019] 1-handle body; 11-connecting section; 12-first cone section; 121-positioning hole; 122-cooling channel; 13-transition section; 131-transition curved surface; 14-second cone section; 141-inner hole; 142-accommodating groove;

[0020] 2-Balance screw. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0022] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0024] In the description of this embodiment, the terms "upper", "lower", "right", "left" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0025] like Figure 1As shown, the utility model provides a heat shrinkable tool handle, which includes a tool handle body 1 and a positioning member. The tool handle body 1 has a connecting section 11, a first cone section 12, a transition section 13 and a second cone section 14 which are sequentially arranged along a first direction. The connecting section 11 is used to connect to a machine tool, and the second cone section 14 has an inner hole 141 for clamping a tool; the transition section 13 has a smooth transition surface 131, and the transition surface 131 is bent in a direction away from the axis of the heat shrinkable tool handle. The small diameter end of the first cone section 12 is connected to the large diameter end of the second cone section 14 through the transition surface 131, and the outer diameter of the small diameter end of the first cone section 12 is larger than the large diameter end of the second cone section 14; the first cone section 12 has a positioning hole 121, and the positioning hole 121 extends along the first direction and is connected to the inner hole 141. The positioning member is adjustably arranged in the positioning hole 121 along the first direction, and the positioning member is used to abut against the end of the tool. In this embodiment, the tool handle body 1 is provided with a connecting section 11, a first cone section 12, a transition section 13 and a second cone section 14 in sequence along a first direction. Since the connecting section 11 is connected to the machine tool and the second cone section 14 has an inner hole 141 that can clamp the tool, the heat shrinkable tool handle can be connected to the machine tool as a whole and clamp the tool for normal cutting operations; since the transition section 13 has a smooth transition surface 131, the small diameter end of the first cone section 12 is connected to the large diameter end of the second cone section 14 through the transition surface 131, the transition surface 131 is bent in a direction away from the axis of the heat shrinkable tool handle, and the outer diameter of the small diameter end of the first cone section 12 is greater than the large diameter end of the second cone section 14, so the outer diameter of the transition surface 131 gradually decreases along the first direction, and the tool cutting operation is smooth. The debris generated during the processing of the heat shrink tool holder will be blocked by the transition surface 131 when it splashes upward, and compared with the flat surface, the transition surface 131 can reduce the contact area with the debris, thereby reducing the friction between the debris and the transition surface 131, avoiding the debris from adhering to the tool holder body 1 and destroying the dynamic balance of the heat shrink tool holder, thereby effectively ensuring the processing quality of the workpiece; since the first cone section 12 has a positioning hole 121 connected to the inner hole 141, the positioning member is adjustably arranged in the positioning hole 121 along the first direction, and the positioning member 121 can abut against the end of the tool, so the position of the positioning member can be adjusted to achieve rapid installation and positioning of tools of different lengths, so as to ensure that the length of the tool extending out of the heat shrink tool holder is consistent, thereby ensuring the processing accuracy requirements for the workpiece. Specifically, the second cone section 14 adopts a common heating method in the field to clamp the tool. The second cone section 14 has a built-in heating coil, which can heat the second cone section 14 in a short time and clamp the tool through the difference in thermal expansion coefficients between the tool handle and the tool. The specific working principle will not be elaborated here.

[0026] Furthermore, if Figure 1As shown, the first cone section 12 has a cooling channel 122, which is connected to the inner hole 141, and the cooling channel 122 is used to circulate coolant. In this embodiment, the external coolant can be injected into the inner hole 141 through the cooling channel 122, so as to cool the tool in the inner hole 141 to achieve a cooling effect, thereby extending the service life of the tool and ensuring the cutting effect.

[0027] Furthermore, the positioning member is a top screw, and the positioning member is threadedly connected with the positioning hole 121. Specifically, a thread matching the top screw is provided on the inner wall of the positioning hole 121. Before installing the tool, the staff screws the top screw into the positioning hole 121, then installs the tool in the inner hole 141 and places the end of the tool against the top screw for installation and positioning; when the tool is seriously worn and needs to be replaced, the staff places the end of the new tool against the top screw again, that is, the surface is installed in place; if the length of the replaced new tool is different from that of the old tool, the position of the top screw in the positioning hole 121 is pre-adjusted, so that when the new tool is against the top screw, the length of the new tool exposed from the inner hole 141 is consistent with the exposed length of the old tool; installing and positioning tools of different lengths by screwing the top screw is simple and reliable, which greatly improves the efficiency of tool change.

[0028] Specifically, Figure 1 As shown, the first cone section 12 has a cooling channel 122 for circulating coolant, and a through hole is provided on the positioning member along the first direction, and the through hole is connected to the cooling channel 122. In this embodiment, the positioning member is arranged in the positioning hole 121, and a through hole is provided on the positioning member along the first direction, so that the coolant in the cooling channel 122 can flow into the positioning hole 121 or the inner hole 141 through the through hole, and there is no need to provide a bypass channel bypassing the positioning member. The coolant flows into the inner hole 141 along a straight line through the positioning members, which has a simple structure and low manufacturing cost.

[0029] Furthermore, if Figure 1 As shown, at least three balancing screws 2 are arranged at equal intervals along the circumferential direction on the same circumferential surface of the first cone section 12, and the balancing screws 2 are threadedly connected to the first cone section 12. In this embodiment, the balancing screws 2 can be arranged in three, four, five, etc., as long as they are evenly arranged along the circumferential direction of the same circle, and the number thereof is not limited here; threaded holes matching the balancing screws 2 are opened on the first cone section 12, and the balancing screws 2 are screwed into the threaded holes. The staff can ensure the dynamic balance of the heat shrinkable tool holder during high-speed rotation by screwing the balancing screws 2 at different positions, so as to achieve high-speed and stable rotation, thereby ensuring the machining accuracy requirements for the workpiece.

[0030] Furthermore, if Figure 1As shown, a plurality of accommodating grooves 142 are provided in the inner hole 141 along the first direction, and the accommodating grooves 142 are used to accommodate impurities. In this embodiment, accommodating grooves 142 are provided on the side wall of the inner hole 141 along the circumference of the inner hole 141, and a plurality of accommodating grooves 142 are provided at intervals along the first direction; specifically, a large amount of impurities and dust will be generated by the tool during the cutting operation, and some of the impurities and dust will enter the inner hole 141. The coolant in the cooling channel 122 can flush the impurities and dust entering the inner hole 141 into the accommodating grooves 142, preventing the impurities or dust from being stuck between the tool and the hole wall of the inner hole 141, thereby avoiding damage to the tool.

[0031] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. Heat shrinkable handle, characterized in that: include: A tool handle body (1), the tool handle body (1) comprising a connecting section (11), a first cone section (12), a transition section (13) and a second cone section (14) arranged in sequence along a first direction, the connecting section (11) being used for connecting to a machine tool, and the second cone section (14) having an inner hole (141) for clamping a tool; The transition section (13) has a smooth transition surface (131), the transition surface (131) is bent in a direction away from the axis of the heat shrinkable tool handle, the small diameter end of the first cone section (12) is connected to the large diameter end of the second cone section (14) through the transition surface (131), and the outer diameter of the small diameter end of the first cone section (12) is larger than the large diameter end of the second cone section (14); A positioning member, wherein the first cone section (12) has a positioning hole (121), the positioning hole (121) extends along the first direction and is connected to the inner hole (141), the positioning member is adjustably arranged in the positioning hole (121) along the first direction, and the positioning member is used to abut against the end of the tool.

2. The heat shrinkable handle according to claim 1, characterized in that: The first cone section (12) has a cooling channel (122), the cooling channel (122) is communicated with the inner hole (141), and the cooling channel (122) is used for circulating a cooling liquid.

3. The heat shrinkable handle according to claim 1, characterized in that: The positioning member is a top screw, and the positioning member is threadedly connected to the positioning hole (121).

4. The heat shrinkable tool handle according to claim 3, characterized in that: The first cone section (12) has a cooling channel (122) for circulating cooling liquid, and a through hole is provided on the positioning member along the first direction, and the through hole is connected to the cooling channel (122).

5. The heat shrinkable handle according to claim 1, characterized in that: At least three balancing screws (2) are arranged at equal intervals in the circumferential direction on the same circumferential surface of the first cone section (12), and the balancing screws (2) are threadedly connected to the first cone section (12).

6. The heat shrinkable tool handle according to any one of claims 1 to 5, characterized in that: A plurality of containing grooves (142) are arranged in the inner hole (141) along the first direction, and the containing grooves (142) are used to contain impurities.

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