Mounting device for tool holders equipped with a cooling function

Abstract

Mounting device for tool holders equipped with a cooling function, comprising: - a tool sleeve holder (10) comprising a main body (30) and a cooling channel (31), wherein the cooling channel (31) extends from the surface of the main body (30) into the interior of the main body (30); and - a tool sleeve (20) arranged in the tool sleeve holder (10) and comprising a receptacle (21) and a tool sleeve flow channel (22), wherein the receptacle (21) is provided for receiving a tool holder arrangement (90; 90A), wherein the tool sleeve flow channel (22) is formed in a part of the tool sleeve (20), which part is located in the tool sleeve holder (10), wherein the tool sleeve flow channel (22) runs from the surface of the tool sleeve (20) inwards thereof such that it is in communication with the receptacle (21), wherein the tool sleeve flow channel (22) is in communication with the cooling channel (31) of the tool sleeve holder (10).

Description

[0001] The invention relates to a component with a tool holder and tool in a processing machine, in particular to an assembly device for tool holders equipped with a cooling function.

[0002] Generally, a machining center is equipped with multiple toolholders loaded with different types of tools, allowing the machining center to offer a wide range of machining capabilities. A conventional machining center is equipped with a tool turret, along the outer circumference of which a variety of toolholder mounting fixtures or tool sleeve assemblies are arranged, each of which can mount different toolholders and tools. By rotating the tool turret, different tools can be aligned with a workpiece for machining.

[0003] Conventional machining centers with a tool turret are equipped with a cooling system with nozzles, which are typically mounted on the toolholder mounting fixture or on the circumference of the tool turret. Coolant is sprayed from the nozzles onto the machining point where the tool is in contact with the workpiece. However, only the machining point where the tool is in contact with the workpiece can be cooled with the coolant from the nozzles. Furthermore, the coolant may be blocked by chips generated during the machining process, thereby impairing the cooling effect.

[0004] The invention is based on the object of creating a mounting device for tool holders equipped with a cooling function, which eliminates the deficiency associated with the prior art.

[0005] The object is achieved according to the invention by a mounting device for tool holders equipped with a cooling function having the features of claim 1. Advantageous embodiments are the subject of the dependent claims.

[0006] The mounting device for tool holders according to the invention, equipped with a cooling function, comprises: - a tool sleeve holder comprising a main body and a cooling channel, the cooling channel extending from the surface of the main body into the interior of the main body; and - a tool sleeve arranged in the tool sleeve holder and comprising a receptacle and a tool sleeve flow channel, wherein the receptacle is provided for receiving a tool holder arrangement, wherein the tool sleeve flow channel is formed in a part of the tool sleeve, which part is located in the tool sleeve holder, wherein the tool sleeve flow channel runs from the surface of the tool sleeve inwards thereof so as to communicate with the receptacle, wherein the tool sleeve flow channel communicates with the cooling channel of the tool sleeve holder.

[0007] The tool holder assembly device according to the invention, equipped with a cooling function, is characterized by the following: The cooling channel formed on the main body of the tool sleeve holder and the tool sleeve flow channel formed on the tool sleeve form a flow path through which the coolant is supplied to the tool holder assembly. The tool holder assembly according to the invention can be used in combination with a tool holder assembly with an internal cooling channel, so that the tool holder and the tool are cooled by internal cooling and the temperature of the machining area is reduced.Compared with the independent external nozzles in conventional machining centers equipped with a tool turret, the tool holder mounting device according to the invention ensures more effective cooling, thus reducing cases of tool thermal deformation and extending the service life of tools used in a tool turret.

[0008] The invention is described in detail below using an exemplary embodiment and with reference to the drawing. The drawing shows: Fig. 1 a perspective view of a preferred embodiment of a mounting device for tool holders according to the invention, equipped with a cooling function, Fig. 2 a sectional view of the mounting device according to the invention in Fig. 1 from a wider angle in perspective view, Fig. 3 an exploded view of a tool sleeve, a spacer sleeve, an outer water supply ring and an inner water supply ring of the assembly device according to the invention in Fig. 1, Fig. 4 a side and sectional view of the mounting device according to the invention in Fig. 1, Fig. 5 a sectional view along the section line AA in Fig. 4, Fig. 6 a schematic representation of the assembly device according to the invention in Fig. 1 in operational condition, and Fig. 7 a schematic representation of the assembly device according to the invention in Fig. 1 with another tool holder arrangement.

[0009] The objects, features, and advantages of the present invention will be explained in more detail below with reference to the detailed description of the exemplary embodiment and the accompanying drawings. The invention is not intended to be limited to the features apparent from the description and the drawings.

[0010] The invention relates to a tool holder mounting device equipped with a cooling function, which mounting device is arranged on a tool turret of a digitally controlled lathe. With a plurality of such tool holder mounting devices, tool holders, to which different tools are attached, can be mounted on the outer circumference of the tool turret such that the tools are arranged in a ring. By rotating the tool turret, different tools can be aligned with a workpiece for machining. Fig. Figure 1 shows a preferred embodiment of a tool holder mounting device according to the invention, equipped with a cooling function. The mounting device comprises a tool sleeve holder 10 and a tool sleeve 20, with the tool sleeve 20 being arranged in the tool sleeve holder 10.

[0011] As in Fig. 1, Fig. 2 and Fig. As shown in Figure 4, the tool sleeve holder 10 comprises a main body 30 and a cooling channel 31. A plurality of connecting holes are arranged on the main body 30, which extend through the main body 30, wherein bolts can be inserted into the connecting holes to fasten the main body 30 to the tool turret. The main body 30 is hollow inside so that the tool sleeve 20 and bearings can be accommodated inside the main body 30. The cooling channel 31 extends from the surface of the main body 30 into the interior of the main body 30. As shown in Fig. As shown in Figure 2, the cooling channel 31 has a water inlet opening 311 formed on the surface of the main body 30. A conduit can connect the water inlet opening 311 and a coolant source so that the coolant can be introduced into the interior of the main body 30 via the cooling channel 31.

[0012] As in Fig. 2 and Fig. 4, the tool sleeve 20 is rotatably arranged inside the main body 30. A bearing is arranged between the tool sleeve 20 and the main body 30, by means of which bearing the tool sleeve 20 is held on the axis of the tool sleeve holder 10. The tool sleeve 20 comprises a receptacle 21 and a tool sleeve flow channel 22, wherein the receptacle 21 extends from one end of the tool sleeve 20 inwardly thereof and is provided for receiving a tool. In the preferred exemplary embodiment, the interior of the receptacle 21 is conically profiled, wherein the inner circumference of the receptacle 21 tapers inwardly from one end of the tool sleeve 20 so that the receptacle 21 can be positively connected to a conically profiled tool.

[0013] As in Fig. 2 to Fig. As shown in Figure 5, the tool sleeve flow channel 22 extends from the outer peripheral surface of the tool sleeve 20 inward toward the receptacle 21, thereby communicating with the receptacle 21. The tool sleeve flow channel 22 and the cooling channel 31 of the main body 30 communicate with each other. Once the coolant enters the cooling channel via the water inlet port 311 and flows further into the interior of the main body 30 of the tool sleeve holder 10, it can flow into the tool sleeve flow channel 22 of the tool sleeve 20 and toward the receptacle 21 to cool the tool holder and the tool received in the receptacle 21.

[0014] To mount a tool with the tool holder mounting device, Fig. 6. A tool holder 91 of a tool holder assembly 90 is received in the receptacle 21 of the tool sleeve 20. A sealing cover 93 is screwed tightly onto the tool sleeve 20. In cooperation with the conical profile of the interior of the receptacle 21, the sealing cover 93 ensures that the tool holder 91 is locked and fixed inside the receptacle 21. When the tool 92 is inserted into the tool holder 91 for machining, the coolant is supplied via the water inlet opening 311, flows through the cooling channel 31 and the tool sleeve flow channel 22 of the tool sleeve 20, and then enters the receptacle 31. The internal cooling channel on the tool holder assembly 90 contributes to the coolant flowing directly through the tool holder 91 or further through the tool 92, thereby causing cooling.The coolant is sprayed directly onto the machining area at a shorter distance, which enables reliable cooling and is also beneficial for chip removal.

[0015] Advantageously, the cooling channel 31 formed on the main body 30 of the tool sleeve holder 10 and the tool sleeve flow channel 22 formed on the tool sleeve 20 form a flow path through which the coolant is supplied to the tool holder assembly 90. The tool holder mounting device according to the invention can be used in combination with the tool holder assembly 90 with an internal cooling channel, so that the tool holder 91 and the tool 92 are cooled by internal cooling and the temperature of the machining site is lowered. Compared with the independent external nozzles in conventional machining centers equipped with a tool turret, the tool holder mounting device according to the invention ensures more effective cooling, thus reducing cases of tool thermal deformation and extending the service life of tools used in a tool turret.

[0016] As in Fig. 2 to Fig. 5, the tool sleeve holder 10 comprises, in particular, a spacer sleeve 40, an outer water supply ring 50, and an inner water supply ring 60. The spacer sleeve 40, the outer water supply ring 50, and the inner water supply ring 60 are arranged between the main body 30 of the tool sleeve holder 10 and the tool sleeve 20. The structural design of the spacer sleeve 40, the outer water supply ring 50, and the inner water supply ring 60 forms a flow path that communicates with the cooling channel 31 and the tool sleeve flow channel 22 of the tool sleeve 20.

[0017] As in Fig. 3 to Fig. As shown in Figure 5, the spacer sleeve 40 rests against the inner surface of the main body 30 and encloses the tool sleeve 20. A plurality of through holes 41 are arranged on the spacer sleeve 40, which pass through the spacer sleeve 40 and extend in different radial directions of the tool sleeve 20. Thus, the coolant can flow through the spacer sleeve 40 in different radial directions via the through holes 41 and flow inward. As shown in Fig. As shown in Figure 5, an annular gap G1 is formed between the main body 30 of the tool sleeve holder 10 and the spacer sleeve 40. The cooling channel 31 extends to the annular gap G1, so that the annular gap G1 communicates with the cooling channel 31 and the through holes 41 of the spacer sleeve 40.

[0018] As in Fig. 3 to Fig. As shown in Figure 5, the outer water supply ring 50 and the inner water supply ring 60 are arranged between the spacer sleeve 40 and the tool sleeve 20. The inner water supply ring 60 is placed on the tool sleeve 20, and the outer water supply ring 50 is placed on the inner water supply ring 60. The outer water supply ring 50 bears against the inner circumferential surface of the spacer sleeve 40. A plurality of outer water supply bores 51 are arranged on the outer water supply ring 50, which extend through the outer water supply ring 50. A plurality of inner water supply bores 61 are arranged on the inner water supply ring 60, which extend through the inner water supply ring 60. The outer water supply bores 51 and the inner water supply bores 61 extend in different radial directions of the tool sleeve 20.Thus, the coolant can flow inward in different radial directions via the outer water supply holes 51 and the inner water supply holes 61 and ultimately flow into the tool sleeve flow channel 22 of the tool sleeve 20.

[0019] As in Fig. 5, an annular outer water supply gap G2 is formed enclosingly between the outer water supply ring 50 and the spacer sleeve 40, wherein the outer water supply gap G2 communicates with the outer water supply holes 51 and the through holes 41. Furthermore, an annular central water supply gap G3 is formed enclosingly between the outer water supply ring 50 and the inner water supply ring 60, wherein the central water supply gap G3 communicates with the outer water supply holes 51 and the inner water supply holes 61. Furthermore, an annular inner water supply gap G4 is formed enclosingly between the inner water supply ring 60 and the tool sleeve 20, wherein the inner water supply gap G4 communicates with the inner water supply holes 61 and the tool sleeve flow channel 22 of the tool sleeve 20.

[0020] The annular gaps ensure that, even if the openings of the through holes 41, the outer water supply holes 51, the inner water supply holes 61, and the tool sleeve flow channel 22 are not directed in the same radial direction, the coolant can still flow unhindered inward toward the tool sleeve flow channel 22 and be supplied to the internal cooling channel of the tool holder assembly 90. The assembly of the spacer sleeve 40, the outer water supply ring 50, and the inner water supply ring 60 can be carried out smoothly. The annular gaps keep the spacer sleeve 40, the outer water supply ring 50, and the inner water supply ring 60 at a low temperature, which helps prevent the temperature inside the main body 30 from remaining too high due to the heat generated by the rotational movement of the tool sleeve 20 in the main body 30.

[0021] As in Fig. 3, the outer water supply ring 50 consists of two rings 52, wherein a plurality of notches 521 are formed in a recessed manner on the respective ring 52, wherein the two rings 52 are assembled symmetrically such that one notch 521 on one ring 52 joins together with the one corresponding notch 521 on the other ring 52, thereby forming the one outer water supply bore 51. According to the invention, the notches 521 on the two rings 52 in the outer water supply ring 50 are manufactured with a relatively greater thickness such that the notches 521 join together to form the outer water supply bores 51.Compared to the manufacturing process in which through holes are machined directly on a single ring, the manufacturing of the outer water supply holes 51 in the described process is facilitated with less resistance, thus ensuring higher precision of the outer water supply ring 50 and the outer water supply holes 51. .

[0022] Furthermore, an O-ring is arranged between the main body 30 of the tool sleeve holder 10 and the spacer sleeve 40, between the spacer sleeve 40 and the outer water supply ring 50, between the outer water supply ring 50 and the inner water supply ring 60, and between the inner water supply ring 60 and the tool sleeve 20. This prevents the coolant from leaking out, so that the coolant is supplied to the internal cooling channel of the tool holder assembly 90 only via the above-mentioned flow path.

[0023] As in Fig. 2 and Fig. 4, the tool holder mounting device further comprises a locking screw 70, which is arranged, for example, in the tool sleeve flow channel 22. The tool sleeve flow channel 22 comprises a plurality of radial sections 221 and one axial section 222, wherein the radial sections 221 extend from the outer peripheral surface of the tool sleeve 22 in different radial directions of the tool sleeve 20 inward to the axial section 222, and the axial section 222 extends in the axial direction of the tool sleeve 20 to the receptacle 21, wherein the axial section 222 is provided with an internal thread so that the locking screw 70 can optionally be screwed into the axial section 222.

[0024] If the internal cooling channel is not used, the plug screw 70 can be screwed into the axial section 222 through the opening of the holder 21 to prevent the coolant from splashing out. If the internal cooling channel is to be used, the plug screw 70 is first loosened from the axial section 222 and removed through the holder 21. The tool holder assembly 90 is then mounted in the holder 21. The coolant can then be conveyed via the cooling channel 31 of the main body 30, the flow path in the tool sleeve holder 10, and the tool sleeve flow channel 22, and supplied to the internal cooling channel in the tool holder assembly 90.

[0025] As in Fig. 2, Fig. 4 and Fig. 6, the tool holder mounting device further includes a cooling nozzle 80 disposed on the main body 30 of the tool sleeve holder 10 and provided with a nozzle flow channel 81, one end of the nozzle flow channel 81 being connected to the cooling channel 31 and an opening 82 being formed at the other end thereof. After entering the cooling channel 31 via the water inlet opening 311, the coolant is separated so that it flows partly into the aforementioned internal cooling channel via the flow path between the main body 30 and the tool sleeve 20 and partly into the nozzle flow channel 81, and is finally sprayed from the opening 82 of the nozzle flow channel 81 onto the tool 92 of the tool holder assembly 90. It is possible to additionally perform cooling using the internal cooling channel.

[0026] In particular, the cooling nozzle 80 has a spherical structure and is recessed in a recess in the main body 30. By fastening a screw to the main body 30 and allowing it to rest against the spherical structure, the cooling nozzle 80 is prevented from detaching from the recess. Thus, the cooling nozzle 80 can be angled and positioned as needed to spray the coolant onto a desired location for cooling. As shown in Fig. 2 and Fig. As shown in Figure 4, the cooling nozzle 80 further includes a nozzle screw 83, which can optionally be arranged at the opening 82 of the nozzle flow channel 81. It is possible to use the internal cooling channel and the cooling nozzle 80 individually or together, as required.

[0027] Fig. Figure 7 shows a schematic representation of the assembly device according to the invention in the preferred embodiment with a further tool holder arrangement 90A. In the tool holder arrangement 90 in Fig. 6, the tool 92 is a six-edged milling cutter that is elongated. Accordingly, the tool holder 91 has an axially extending slot provided for mounting the tool holder 91, with the internal cooling channel being formed continuously on the tool holder 91 and the tool 92. The tool holder arrangement 90A in Fig. 7 comprises two tools 92A, each of which is a turning tool. The tool holder 91A is a turning tool holder, on which a recess is arranged for receiving the two tools 92A. The internal cooling channel is formed on the tool holder 91A, with the opening aligned with the two tools 92A.

[0028] In the preferred embodiment, it is possible to equip the tool holder arrangement in addition to the tool holder and the tool, depending on the tool type and method of fastening for the tool, with further components such as a collet, a counter screw, etc. and to design the shape of the internal cooling channel depending on the cooling requirements, whereby the design of the tool holder arrangement is not limited to the tool holder arrangements 90, 90A in Fig. 6 and Fig. 7 is limited.

[0029] Although the present invention has been described in detail using an exemplary embodiment, it will be understood by those skilled in the art that the invention is not limited to this exemplary embodiment. Rather, modifications are possible such that individual features can be omitted or different combinations of features can be implemented without exceeding the scope of the appended claims. The disclosure of the present invention includes all combinations of the individual features presented. List of reference symbols 10 tool sleeve holders 20 tool sleeve 21 recording 22 Tool sleeve flow channel 221 Radial section 222 axial section 30 main bodies 31 Cooling channel 311 Water inlet opening 40 spacer sleeve 41 Through hole 50 outer water supply ring 51 external water supply hole 52 rings 521 notch 60 inner water supply ring 61 internal water supply hole 70 locking screw 80 Cooling nozzle 81 Nozzle flow channel 82 Opening 83 Nozzle screw 90, 90A tool holder arrangement 91, 91A tool holder 92, 92A tool 93 Sealing cover A cutting line G1 annular gap G2 external water supply gap G3 central water supply gap G4 internal water supply gap

Claims

[1] Mounting device for tool holders equipped with a cooling function, comprising: - a tool sleeve holder (10) comprising a main body (30) and a cooling channel (31), wherein the cooling channel (31) extends from the surface of the main body (30) into the interior of the main body (30); and - a tool sleeve (20) arranged in the tool sleeve holder (10) and comprising a receptacle (21) and a tool sleeve flow channel (22), wherein the receptacle (21) is provided for receiving a tool holder arrangement (90; 90A), wherein the tool sleeve flow channel (22) is formed in a part of the tool sleeve (20), which part is located in the tool sleeve holder (10), wherein the tool sleeve flow channel (22) runs from the surface of the tool sleeve (20) inwards thereof such that it is in communication with the receptacle (21), wherein the tool sleeve flow channel (22) is in communication with the cooling channel (31) of the tool sleeve holder (10). [2] Mounting device according to claim 1, characterized bythat the tool sleeve holder (10) comprises a spacer sleeve (40), wherein the spacer sleeve 40 rests against the inner surface of the main body (30) and encloses the tool sleeve (20), wherein at least one through-bore (41) is arranged on the spacer sleeve (40), which through-bore passes through the spacer sleeve (40), so that the coolant flows from the cooling channel (31) of the main body (30) through the through-bore (41) and finally flows into the tool sleeve flow channel (22). [3] Mounting device according to claim 1 or 2, characterized by that an annular gap (G1) is formed between the spacer sleeve (40) and the tool sleeve holder (10), which gap is connected to the cooling channel (31) of the tool sleeve holder (10) and the through-bore (41). [4] Mounting device according to claim 2 or 3, characterized byin that the tool sleeve holder (10) comprises an outer water supply ring (50) and an inner water supply ring (60), wherein the inner water supply ring (60) is plugged onto the tool sleeve (20) and the outer water supply ring (50) is plugged onto the inner water supply ring (60), wherein the outer water supply ring (50) bears against the inner circumferential surface of the spacer sleeve (40), wherein at least one outer water supply bore (51) is arranged on the outer water supply ring (50), which extends through the outer water supply ring (50), wherein at least one inner water supply bore (61) is arranged on the inner water supply ring (60), which extends through the inner water supply ring (60), so that the coolant flows from the through-bore (41) of the spacer sleeve (40) through the outer and inner water supply bores (51, 61) and finally flows into the tool sleeve flow channel (22). [5] Mounting device according to claim 4, characterized bythat an annular outer water supply gap (G2) is formed between the outer water supply ring (50) and the spacer sleeve (40), wherein the outer water supply gap (G2) is connected to the through hole (41) and the outer water supply hole (51) of the outer water supply ring (50). [6] Mounting device according to claim 4 or 5, characterized by that an annular central water supply gap (G3) is formed between the outer water supply ring (50) and the inner water supply ring (60), wherein the central water supply gap (G3) is connected to the outer water supply bore (51) of the outer water supply ring (50) and the inner water supply bore (61) of the inner water supply ring (60). [7] Mounting device according to one of claims 4 to 6, characterized bythat an annular inner water supply gap (G4) is formed between the inner water supply ring (60) and the tool sleeve (20), wherein the inner water supply gap (G4) is connected to the inner water supply bore (61) of the inner water supply ring (60) and the tool sleeve flow channel (22) of the tool sleeve (20). [8] Mounting device according to one of claims 4 to 7, characterized by that the outer water supply ring (50) consists of two rings (52), wherein at least one notch 521 is recessed on the respective ring (52), wherein the two rings (52) are assembled such that one notch (521) on one ring (52) joins together with the one corresponding notch (521) on the other ring (52), whereby the one outer water supply bore (51) is formed. [9] Mounting device according to one of the preceding claims, characterized byin that the tool sleeve flow channel (22) comprises at least one radial section (221) and one axial section (222), wherein the radial section (221) extends inwards from the outer circumferential surface of the tool sleeve (22) and the axial section (222) extends from the radial section (221) in the axial direction to the receptacle (21), wherein the axial section (222) is provided with an internal thread, wherein the mounting device for tool holders comprises a locking screw (70) which can optionally be screwed into the axial section (222). [10] Mounting device according to one of claims 1 to 9, characterized byin that the mounting device for tool holders comprises a cooling nozzle (80) which is connected to the main body (30) of the tool sleeve holder (10), wherein a nozzle flow channel (81) is arranged inside the cooling nozzle (80), one end of which is connected to the cooling channel (31) and thus communicates with the same, wherein an opening (82) is formed at the other end of the nozzle flow channel (81), from which opening the coolant is sprayed onto the tool holder arrangement (90; 90A).

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