Cutter clamping device for die steel milling machine

Abstract

The utility model provides a cutter clamping device for a die steel milling machine, which comprises a conical sleeve, a locking nut, a milling cutter and a plurality of locking pieces, a handle part of the milling cutter is provided with a locking groove along the radial direction, and the locking nut is installed on the peripheral surface of the bottom end of the conical sleeve in a threaded fastening manner; a locking groove is formed in the peripheral face of a handle of the milling cutter, a plurality of mounting holes are formed in the positions, corresponding to the locking groove, of the peripheral face of a conical sleeve, and one end of a locking piece penetrates through the mounting holes in the radial direction and is clamped in the locking groove in the position of the handle of the milling cutter, so that when the milling cutter is used for cutting die steel, the die steel is not prone to falling off. Even under the condition that the cutter bears large cutting resistance, due to the fact that the locking piece axially limits the cutter, the milling cutter cannot axially slide out of the spring chuck composed of the conical sleeve and the locking nut. According to the whole tool clamping device, grooving is carried out on an existing spring chuck, a plurality of locking pieces are arranged, and the tool clamping device is simple in structure and low in cost.

Description

Technical Field

[0001] This utility model relates to the field of milling machine processing equipment technology, and specifically to a tool clamping device for a mold steel milling machine. Background Technology

[0002] Mold steel is a type of steel used to manufacture molds such as cold stamping dies, hot forging dies, and die casting molds. Mold materials are the material and technological foundation of the mold manufacturing industry. Among them, mold steel is a traditional mold material, and its variety, specifications, and quality play a decisive role in the performance, service life, and manufacturing cycle of the mold.

[0003] In the industrial processing of mold steel, different processing requirements necessitate different processing equipment. For example, when machining mold steel requires cutting, grooving, or drilling, a milling machine is needed. Due to its high hardness, mold steel is equipped with a dedicated milling machine. During the cutting process, the milling machine uses a milling cutter to cut the mold steel. To prevent the milling cutter from slipping axially from the tool clamping device when machining high-hardness mold steel, high-clamping-force clamping devices are often used, such as hydraulic tool holders, heat-shrink tool holders, or even direct threaded connection between the cutter holder and the spindle. While hydraulic and heat-shrink tool holders can effectively clamp the cutter, their structure is complex and costly. The direct threaded connection between the cutter holder and the spindle is only suitable for certain large-diameter face milling cutter structures.

[0004] Therefore, it is particularly important to provide a tool clamping device structure that is simple in structure, low in cost, and applicable to die steel milling machines. Summary of the Invention

[0005] In view of the deficiencies in the existing technology, the purpose of this utility model is to provide a tool clamping device for a mold steel milling machine that is simple in structure and low in cost.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] This application provides a tool clamping device for a die steel milling machine, including a tapered sleeve and a locking nut, as well as a milling cutter and a plurality of locking elements. The handle portion of the milling cutter has a locking groove formed radially, and the handle portion of the milling cutter is installed in the inner cavity of the tapered sleeve. The locking nut is threadedly fastened to the outer circumferential surface of the bottom end of the tapered sleeve. The locking nut is used to lock the milling cutter in the inner cavity of the tapered sleeve. The outer circumferential surface of the tapered sleeve has a plurality of insertion holes corresponding to the locking groove. One end of each of the plurality of locking elements is radially clamped in the locking groove through the plurality of insertion holes.

[0008] Furthermore, a nut is provided on the outer circumferential surface of the tapered sleeve at the position corresponding to the insertion hole, and the locking member is fixedly installed on the tapered sleeve by the nut thread.

[0009] Furthermore, the locking element is a bolt.

[0010] Furthermore, the locking groove is an annular groove formed radially along the outer peripheral surface of the handle of the milling cutter.

[0011] Furthermore, the locking groove is formed in a plurality of mounting holes radially disposed along the outer peripheral surface of the handle of the milling cutter.

[0012] Furthermore, the locking groove is a plurality of slots formed radially along the outer peripheral surface of the handle of the milling cutter.

[0013] Furthermore, there are three locking elements, which are arranged at 120° intervals apart.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. By adopting the above-mentioned tool clamping device for milling machines for mold steel, a locking groove is formed on the outer circumferential surface of the milling cutter handle based on the existing spring collet (ER collet) composed of a tapered sleeve and a locking nut. Several mounting holes are opened on the outer circumferential surface of the tapered sleeve at the position corresponding to the locking groove. One end of the locking element passes radially through the mounting hole and is locked in the locking groove at the handle of the milling cutter. In this way, when the milling cutter is cutting mold steel, even if the tool is subjected to large cutting resistance, the milling cutter will not slide axially out of the spring collet composed of the tapered sleeve and the locking nut because the locking element provides axial restraint to the tool. As can be seen from the above, the entire tool clamping device is a simple structure with low cost, which is achieved by slotting an existing spring collet and configuring several locking elements.

[0016] 2. A nut is fixed at the corresponding insertion hole on the tapered sleeve, and the locking element is threaded onto the nut. By tightening the locking element on the nut, one end of the locking element extends into and engages with the locking groove on the cutter shank, preventing axial movement of the cutter. At the same time, when the cutter needs to be replaced, the locking element can be easily replaced by turning it in the opposite direction, pushing one end of the locking element out of the locking groove, and then loosening the locking nut. This is convenient and quick. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of a tool clamping device for a mold steel milling machine according to an embodiment of this application.

[0018] Figure 2 This is an exploded view of the installation and assembly structure of the tool clamping device for a mold steel milling machine according to an embodiment of this application.

[0019] Figure 3 This is a schematic diagram of the structure in which the handle of the milling cutter in this embodiment is installed inside the tapered sleeve.

[0020] Figure 4 This is a schematic diagram of the locking member in an embodiment of this application cooperating with the handle of a milling cutter with an annular groove.

[0021] Figure 5 This is a schematic diagram of the locking member in an embodiment of this application cooperating with the handle of a milling cutter with a slot.

[0022] Figure 6 This is a schematic diagram of the locking member in an embodiment of this application cooperating with the handle of a milling cutter with a mounting hole.

[0023] In the picture:

[0024] 10-Tool clamping device; 100-Conical sleeve; 101-Nut; 200-Locking nut; 300-End mill; 301-Locking groove; 400-Locking element; 500-Annular groove; 600-Mounting hole; 700-Slot. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0026] See appendix Figure 1 To be continued Figure 2As shown, this embodiment provides a tool clamping device 10 for a mold steel milling machine, including a tapered sleeve 100, a locking nut 200, a milling cutter 300, and a plurality of locking components 400. The locking nut 200 is installed on the outer circumferential surface of the bottom end of the tapered sleeve 100 to radially lock the tapered sleeve 100, so that the handle of the milling cutter 300 installed in the inner cavity of the tapered sleeve 100 is radially pressed to prevent it from axially slipping out of the tapered sleeve 100.

[0027] It should be noted that in this embodiment, the fit between the tapered sleeve 100 and the locking nut 200 adopts the existing spring collet (ER collet) structure. In order to enable its application in scenarios with larger cutting forces (cutting of mold steel), this embodiment provides a locking groove 301 radially on the outer circumferential surface of the end mill 300 handle. Correspondingly, a plurality of insertion holes are provided on the outer circumferential surface of the tapered sleeve 100 at the positions corresponding to the locking groove 301. The plurality of insertion holes are evenly spaced radially along the outer circumferential surface of the tapered sleeve 100. One end of each of several locking elements 400 is inserted into one of several insertion holes and extends into the locking groove 301 on the shank of the milling cutter 300. After one end of the locking element 400 is inserted into the locking groove 301 on the shank of the milling cutter 300, the locking element 400 will not move in the axial direction of the shank of the milling cutter 300 because it is fixedly installed in the insertion hole on the tapered sleeve 100. Since one end of the locking element 400 is engaged in the locking groove 301 on the shank of the milling cutter 300, the locking element 400 will also restrict the axial movement of the shank of the milling cutter 300. Thus, when the milling cutter 300 is cutting mold steel, even if the tool is subjected to large cutting resistance, the locking element 400 will axially limit the tool, and the milling cutter 300 will not slide out axially from the spring collet formed by the tapered sleeve 100 and the locking nut 200.

[0028] By adopting the tool clamping device described in this embodiment, the entire tool clamping device is made by slotting an existing spring collet and configuring several locking elements 400. Its structure is simple and its cost is low.

[0029] Continue to refer to the appendix Figure 1 and attached Figure 2 As shown, in some embodiments, a nut 101 is provided on the outer peripheral surface of the tapered sleeve 100 at the position corresponding to the insertion hole. For example, the nut 101 is fixed to the outer peripheral surface of the insertion hole by welding, and the locking member 400 is threadedly fixed to the tapered sleeve 100 by the nut 101. In some embodiments, the locking member 400 may be a bolt.

[0030] A nut 101 is fixed at the position corresponding to the insertion hole on the tapered sleeve 100. The locking member 400 is threaded onto the nut 101. By tightening the locking member 400 on the nut 101, one end of the locking member 400 extends into and engages with the locking groove 301 on the shank of the end mill 300, preventing the end mill 300 from moving axially. At the same time, when the end mill 300 needs to be replaced, it is also convenient to push one end of the locking member 400 out of the locking groove 301 by turning the locking member 400 in the opposite direction. Then, by loosening the locking nut 200, the end mill 300 can be replaced, which is convenient and quick.

[0031] In some embodiments, there are three locking members 400, which are arranged at 120° angle intervals.

[0032] In some embodiments, a mark may be provided on the outer surface of the locking member 400. When the locking member 400 is screwed into the locking nut 200, and the screwing length of the locking member 400 in the locking nut 200 reaches the marked mark, it indicates that the screwing end of the locking member 400 has been engaged in the locking groove 301 on the shank of the milling cutter 300, and the locking member 400 is fully screwed in. Alternatively, a fixed-length locking member 400 (e.g., a bolt) may be used. When the threaded portion of the bolt is fully screwed into the locking nut 200, it indicates that the bolt is also fully screwed in, meaning that the bottom end of the bolt has been engaged in the locking groove 301 in the shank of the milling cutter 300. By using a marked or fixed-length locking member 400, the operator can more intuitively judge whether it is fully screwed in when locking the shank of the milling cutter 300, facilitating the operator's operation.

[0033] See attached document Figure 3 and attached Figure 4 As shown, in some embodiments, the locking groove 301 is an annular groove 500 formed radially on the outer peripheral surface of the handle of the milling cutter 300. Since the annular groove 500 is located on the radial outer peripheral surface of the entire handle of the milling cutter 300, the operator does not need to consider whether the insertion hole on the tapered sleeve 100 is aligned with the locking groove 301 on the handle of the milling cutter 300 when screwing in the locking member 400. The locking member 400 is convenient and quick to install on the tapered sleeve 100.

[0034] See attached document Figure 5 and attached Figure 6 As shown, in some embodiments, the locking groove 301 is a plurality of mounting holes 600 formed radially along the outer peripheral surface of the handle of the milling cutter 300 (see attached figure). Figure 6 ) or several slots 700 (see attached) Figure 5The locking groove 301, by employing spaced mounting holes 600 or slots 700, can reduce the impact on the strength of the tool holder of the milling cutter 300.

[0035] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A tool clamping device for use on a die steel milling machine comprising a tapered sleeve and a locking nut, characterised in that, It also includes a milling cutter and several locking components. The handle of the milling cutter has a locking groove formed radially. The handle of the milling cutter is installed in the inner cavity of the tapered sleeve. The locking nut is threadedly fastened to the outer circumferential surface of the bottom end of the tapered sleeve. The locking nut is used to lock the milling cutter in the inner cavity of the tapered sleeve. The outer circumferential surface of the tapered sleeve has several insertion holes corresponding to the locking groove. One end of each of the locking components is radially engaged in the locking groove through the several insertion holes.

2. A tool clamping device for a die steel milling machine as claimed in claim 1, wherein, A nut is provided on the outer circumferential surface of the tapered sleeve at the position corresponding to the insertion hole, and the locking member is fixedly installed on the tapered sleeve by the nut thread.

3. A tool clamping device for a die steel milling machine as defined in claim 2, wherein The locking element is a bolt.

4. A tool clamping device for a die steel milling machine according to claim 1 or 2, characterized in that, The locking groove is an annular groove formed radially along the outer peripheral surface of the handle of the milling cutter.

5. A tool clamping device for a die steel milling machine according to claim 1 or 2, characterized in that, The locking groove is formed by a plurality of mounting holes arranged radially along the outer peripheral surface of the handle of the milling cutter.

6. A tool clamping device for a die steel milling machine according to claim 1 or 2, characterized in that, The locking groove is a plurality of slots formed radially along the outer peripheral surface of the handle of the milling cutter.

7. A tool clamping device for a die steel milling machine according to claim 1 or 2, characterized in that, There are three locking elements, which are arranged at 120° intervals apart.

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