Cutter fixing structure with safety lock

Abstract

The utility model discloses a cutter fixing structure with a safety lock, which comprises a thermal shrinkage cutter handle and a cutter, and the cutter comprises a connecting section, a locking section and a cutting edge section which are arranged in sequence; the thermal shrinkage cutter handle comprises a clamping end connected with a machine tool, a cutter sleeve is arranged on one side of the clamping end, and a cutter locking end is arranged on one side of the cutter sleeve. A second through mounting hole is formed in the cutter locking end in the axial direction of the cutter locking end, a spiral positioning protrusion is arranged on the inner side wall of the second mounting hole, a positioning groove is formed in the outer side wall of the locking section, and a cooling groove is formed in the periphery of the right portion of the second mounting hole; a flow dividing hole extending inwards is formed in the outer side wall of the cutter locking end, and a drainage hole is formed in the cooling groove in the circumferential direction. The tool fixing structure can solve the problems that when an existing tool fixing structure is used for machining a workpiece with non-uniform allowance, the tool pulling phenomenon is prone to occurring, the surface of a tool is damaged, and the positioning precision and the service life of the tool are affected.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical processing tool fixing technical field, concretely is a tool fixing structure with safety lock. BACKGROUND

[0002] Tool fixing structure is an important technical branch in the field of mechanical processing, which involves the connection and fixing mode between the tool and the main shaft of the machine tool. With the continuous development of modern mechanical processing technology, the design and performance of tool fixing structure are also constantly optimized and improved. Traditional tool fixing methods mainly include side fixing type, pressing plate type, etc. These methods meet the basic needs of mechanical processing to a certain extent, but have limitations in high-precision and high-efficiency processing. The tool is prone to looseness during processing due to excessive cutting resistance, affecting the processing accuracy and tool service life. At the same time, the tool encounters large or uneven allowance workpieces during processing, which makes the cutting resistance of the tool increase during high-speed processing, causing the tool to pull out and resulting in product scrap, size defects, tool fracture, etc. In addition, when processing unstable or large allowance parts, the tool is prone to be affected by its own runout, causing the tool to be damaged faster and accordingly prolonging the tool processing cycle and affecting production capacity. Therefore, it is particularly important to design a new tool fixing structure. SUMMARY

[0003] The utility model provides a tool fixing structure with safety lock can solve the problem that the tool fixing structure of prior art is prone to tool pulling out during processing of uneven allowance workpieces, which causes damage to the tool surface, affects positioning accuracy and tool life.

[0004] To achieve the above object, the utility model provides the following technical scheme: a tool fixing structure with safety lock, including heat shrinkage tool handle and tool, the tool includes the connecting section and locking section and blade section which are sequentially arranged, the heat shrinkage tool handle includes the clamping end which is connected with the machine tool, one side of the clamping end is provided with the tool sleeve for fixing the connecting section, one side of the tool sleeve is provided with the tool locking end, the second installation hole is arranged in the tool locking end along its axial direction, the inner side wall of the second installation hole is provided with the positioning protrusion in the form of spiral, the outer side wall of the locking section is provided with the positioning groove corresponding with the positioning protrusion, the outer periphery of the right part of the second installation hole is provided with a circle of cooling groove, the outer side wall of the tool locking end near one end of the tool sleeve is provided with a plurality of inwardly extending shunt holes along the circumferential direction, the shunt hole is communicated with the second installation hole, the cooling groove is provided with the drainage hole corresponding with the shunt hole along the circumferential direction, the drainage hole is arranged obliquely, and it is ensured that the cooling liquid can uniformly and effectively cool the tool, the tool can be firmly locked on the heat shrinkage tool handle through the arrangement of the positioning protrusion and the positioning groove, the heat shrinkage tool handle is internally provided with a cooling flow channel, the cooling liquid is sprayed from the main shaft end, the design of the shunt hole and the drainage hole makes the cooling liquid flow through the tool uniformly, effectively reduces the temperature of the tool, and prolongs the service life of the tool.

[0005] As preferred, the cross section of the positioning protrusion is semicircular, facilitating machining.

[0006] As preferred, the end of the tool sleeve is provided with the first installation hole matched with the connecting section, one side of the first installation hole is provided with the first through hole for cooling liquid injection.

[0007] As preferred, the connecting section is symmetrically provided with the cutting surface, and the cutting surface and the first installation hole form a gap for cooling liquid inflow.

[0008] As preferred, the side end face of the tool locking end is provided with the cooling port corresponding with the drainage hole, and the cooling liquid is used to cool the tool.

[0009] As preferred, the orifice of the outer side face of the shunt hole is sealed by the plug, and the plug prevents the cooling liquid from leaking.

[0010] As preferred, the outer side of the one end of the clamping end near the tool sleeve is provided with the mounting flange for increasing the stability and reliability of connection.

[0011] As preferred, the clamping end is internally provided with the mounting groove butted with the machine tool, and the mounting groove facilitates quick and accurate installation of the heat shrinkage tool handle on the machine tool.

[0012] Compared with the prior art, the utility model has the advantages of

[0013] Simple structure, through set up positioning convex and positioning recess, the cutter can be firmly locked on the heat shrinkage handle, prevent in the machining process because of cutting resistance is too big or other external force action and slack or fall off, set up cooling structure in the heat shrinkage handle, form the cutter internal cooling, the coolant can evenly flow through the cutter, effectively reduce the temperature of the cutter, prolong the service life of the cutter. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the three-dimensional structure diagram of the utility model;

[0015] Figure 2 It is the main view cross section structure diagram of the utility model;

[0016] Figure 3 It is the three-dimensional structure diagram of the heat shrinkage handle of the utility model;

[0017] Figure 4 It is the main view cross section structure diagram of the heat shrinkage handle of the utility model;

[0018] Figure 5 It is the three-dimensional structure diagram of the cutter of the utility model;

[0019] Figure 6 It is the cross section structure diagram of cooling groove.

[0020] Reference signs:

[0021] 1, heat shrinkage handle, 2, cutter, 11, clamping end, 111, installation groove, 12, cutter sleeve, 121, first installation hole, 122, first through hole, 13, cutter locking end, 14, installation flange, 131, second installation hole, 132, positioning convex, 133, shunt hole, 134, drainage hole, 135, cooling groove, 136, cooling port, 21, connecting section, 211, cutting surface, 221, positioning recess, 22, locking section, 23, cutting edge section. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model.

[0023] For example, Figures 1-6The utility model discloses a tool fixing structure with safety lock, including heat shrinkage tool handle 1 and tool 2, the tool 2 includes the connecting section 21 and locking section 22 and cutting edge section 23 that set gradually, the heat shrinkage tool handle 1 includes the clamping end 11 that is connected with machine tool, one side of clamping end 11 is provided with the tool sleeve 12 for fixing connecting section 21, one side of tool sleeve 12 is provided with tool tight locking end 13, the outside wall of clamping end 11 and tool tight locking end 13 is conical, and the outside of tool sleeve 12 is cylindrical, the second installation hole 131 of through in tool tight locking end 13 is provided with the positioning protrusion 132 of spiral on the inside wall of second installation hole 131, and the outside wall of locking section 22 is provided with the positioning recess 221 corresponding with positioning protrusion 132, and the outer periphery of the right part of second installation hole 131 is provided with a circle cooling groove 135 for cooling tool, the outside wall of tool tight locking end 13 is provided with a plurality of inwardly extending shunt holes 133 along the circumferential direction close to one end of tool sleeve 12, and shunt hole 133 is used to guide the flow of coolant, and shunt hole 133 is communicated with second installation hole 131, and the cooling groove 135 is provided with the drainage hole 134 corresponding with shunt hole 133 along the circumferential direction, and drainage hole 134 is inclinedly arranged, ensures that coolant can uniformly and effectively cool tool, positioning protrusion 132 and positioning recess 221 are arranged, and tool 2 can be firmly locked on heat shrinkage tool handle 1, prevent loosening or falling off in the machining process due to excessive cutting resistance or other external force, and the temperature of tool is effectively reduced by the cooling flow channel in heat shrinkage tool handle 1, and the service life of tool is prolonged.

[0024] In the embodiment, as shown in the figure, Figure 4 The cross section of the positioning protrusion 132 is semicircular, facilitating machining.

[0025] In the embodiment, as shown in the figure, Figure 4 The end of the tool sleeve 12 is provided with a first installation hole 121 matched with the connecting section 21, and a first through hole 122 is arranged on one side of the first installation hole 121 for injecting coolant.

[0026] In the embodiment, as shown in the figure, Figure 5 The connecting section 21 is symmetrically provided with a cutting surface 211, and a gap is formed between the cutting surface 211 and the first installation hole 121 for the inflow of coolant.

[0027] In the embodiment, as shown in the figure, Figure 3As shown, the side end face of the tool locking end 13 is provided with a cooling port 136 corresponding to the drainage hole 134, and the cooling liquid flows out of the cooling tool.

[0028] In the embodiment, as shown in the figure, Figure 4 As shown, the hole of the outer side surface of the shunt hole 133 is sealed by a plug, which prevents the leakage of the cooling liquid.

[0029] In the embodiment, as shown in the figure, Figure 3 As shown, the clamping end 11 is provided with a mounting flange 14 outside one end of the tool sleeve 12, which is used to increase the stability and reliability of the connection.

[0030] In the embodiment, as shown in the figure, Figure 4 As shown, the clamping end 11 is provided with a mounting groove 111 which is connected to the machine tool, which facilitates the quick and accurate installation of the heat shrinkable tool handle 1 to the machine tool.

[0031] In the embodiment, as shown in the figure, Figures 1-2 As shown, the user fixes the heat shrinkable tool handle 1 on the heater, starts the heater, and heats the heat shrinkable tool handle 1, which expands by using the principle of thermal expansion and contraction. At this time, the user picks up the tool 2 and rotates the tool 2, so that the locking section 22 cooperates with the tool locking end 13, the connecting section 21 of the tool 2 is inserted into the first mounting hole 121 of the tool sleeve 12, and the locking of the tool is realized through the positioning protrusion 132 and the positioning groove 221. During operation, the cooling liquid flows to the tool sleeve 12 through the first through hole 122, and the cooling liquid cools the tool through the shunt hole 133, the drainage hole 134, the cooling groove 135 and the cooling port 136.

[0032] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the utility model are only used to explain the relative position relationship, movement condition, etc. between the components in a certain posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

[0033] In addition, the description of "first", "second" and the like in the utility model is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can be explicitly or implicitly included at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0034] In the utility model, unless another definite provision and limitation, the term "connect", "fix" and so on should do the broad sense understanding, for example, "fix" can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electric connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two element inside's intercommunication or two element's mutual action relation, unless another definite limitation.For the ordinary skill in the art, the specific meaning of the above-mentioned term in the utility model can be understood according to the specific circumstances.

[0035] In addition, the technical solutions of various embodiments of the present application can be combined with each other, but must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, also not within the protection scope required by the present application.

Claims

1. A tool fixing structure with safety lock, comprising a heat shrink tool holder (1) and a tool (2), characterized in that: the tool (2) comprises a connecting section (21), a locking section (22) and a blade section (23) arranged in sequence; the heat shrink tool holder (1) comprises a clamping end (11) connected to a machine tool, one side of the clamping end (11) is provided with a tool sleeve (12) for fixing the connecting section (21), one side of the tool sleeve (12) is provided with a tool locking end (13); the tool locking end (13) is provided with a through second mounting hole (131) along its axial direction, the inner side wall of the second mounting hole (131) is arranged with a spiral positioning protrusion (132), the outer side wall of the locking section (22) is provided with a positioning groove (221) corresponding to the positioning protrusion (132), the outer periphery of the right part of the second mounting hole (131) is provided with a circle of cooling grooves (135); the outer side wall of the tool locking end (13) near one end of the tool sleeve (12) is provided with a plurality of inwardly extending shunt holes (133) in the circumferential direction, the shunt holes (133) are in communication with the second mounting hole (131), the cooling grooves (135) are provided with drainage holes (134) corresponding to the shunt holes (133) in the circumferential direction, and the drainage holes (134) are inclined.

2. The knife securing structure with a safety lock according to claim 1, characterized by: The cross section of the positioning protrusion (132) is semicircular.

3. The knife securing structure with a safety lock according to claim 1, characterized by: The end of the tool sleeve (12) is provided with a first mounting hole (121) matched with the connecting section (21), one side of the first mounting hole (121) is provided with a first through hole (122).

4. The knife securement structure having a safety lock according to claim 3, characterized by: The connecting section (21) is symmetrically provided with a cutting surface (211), and the cutting surface (211) and the first mounting hole (121) form a gap for the inflow of cooling liquid.

5. The knife securement structure having a safety lock according to claim 1, characterized by: The side end face of the tool locking end (13) is provided with a cooling port (136) corresponding to the drainage hole (134).

6. The knife securement structure with safety lock of claim 1, wherein: The orifice of the outer side surface of the shunt hole (133) is sealed by a plug.

7. The knife securement structure with safety lock of claim 1, wherein: The clamping end (11) is provided with a mounting flange (14) on the outer side of one end near the tool sleeve (12).

8. The knife securement structure with safety lock of claim 1, wherein: The clamping end (11) is provided with a mounting groove (111) for docking with the machine tool.

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