Disc tool magazine of machining center and tool clamping claws of disc tool magazine

Abstract

The cutter clamping claw comprises a cutter claw mounting seat and a pair of cutter claw arms, a claw opening is formed by a vacancy between the two cutter claw arms, the cambered surface, facing the claw opening, of each cutter claw arm is an inner claw surface, the bottom edge of each cutter claw arm is located on the edge of one side of the inner claw surface, and a limiting ridge is located in the middle of the inner claw surface. A limiting groove is formed between the limiting ridge and the bottom edge, and an outer edge is arranged outside the cutter to be clamped into the limiting groove. The face, facing the bottom edge, of the limiting ridge is connected with a first jacking block through a spring and used for abutting against the end face of the outer edge of the tool to the bottom edge, and the inner claw face is connected with a second jacking block in the limiting groove through a spring and used for abutting against the side face claw opening of the tool. Therefore, the first jacking block and the second jacking block can respectively press the cutter, the acting force directions are perpendicular to each other, a complementary effect can be achieved, the cutter is fixed on the cutter clamping claw through a simple structure, and continuous and orderly proceeding of machining operation is maintained.

Description

Technical Field

[0001] The utility model relates to the technical field of machining centers, in particular to a disc tool magazine of a machining center and its tool clamping claws. Background Art

[0002] A machining center is a device developed on the basis of a milling machine. The main components of a machining center include a machine tool body, a numerical control system, a tool magazine, tools, and tool clamping claws, etc. A machining center has the characteristics of high precision, high efficiency, and high automation, and is widely used in industries such as aerospace, automotive, electronics, and instrumentation.

[0003] A tool magazine is a device that provides the storage and tool change requirements needed in the automated machining process. The tool magazine can store multiple tools of different types and sizes. Therefore, a machining center can integrate functions such as milling, boring, drilling, tapping, and threading on one device. The tool disc of the tool magazine is generally of a disc-shaped structure, and multiple tools are respectively clamped and fixed by a plurality of tool clamping claws arranged along the circumference of the tool disc. The position of the tool is changed by the rotation of the tool disc, and the tool rotated to a predetermined replacement position is taken out or put in by a manipulator or a swing arm of a tool change mechanism.

[0004] Since the tool disc needs to rotate from time to time during operation, the tool in the tool clamping claw tends to fall off under the action of centrifugal force. Therefore, the clamping of the tool needs to be firm enough. If the tool falls off, it will cause adverse consequences such as shutdown and even damage. It is necessary to improve the structure of the tool clamping claw and propose a technical solution that can effectively clamp the tool. Summary of the Utility Model

[0005] In view of this, the purpose of the present utility model is to provide a disc tool magazine of a machining center and its tool clamping claws to solve the above problems.

[0006] In order to achieve the above purpose, the present utility model adopts the following technical solutions:

[0007] The present utility model provides a tool clamping claw for a disc tool magazine, which is characterized in that it includes a tool claw mounting seat and a pair of tool claw arms connected to the tool claw mounting seat. The tool claw arms are arc-shaped, and the space between the two tool claw arms forms a claw mouth for clamping a tool. The arc surface of the tool claw arm facing the claw mouth is an inner claw surface. An undercut and a limiting ridge are formed by protrusions on the inner claw surface. Both the undercut and the limiting ridge extend along the circumference of the inner claw surface to form an arc-shaped structure. The undercut is located on one side edge of the inner claw surface, and the limiting ridge is located in the middle of the inner claw surface. A limiting groove is formed between the limiting ridge and the undercut. An outer edge is provided outside the tool, and when the tool enters the claw mouth, the outer edge is clamped into the limiting groove.

[0008] Wherein, a first pressing block is connected to the side of the limiting ridge facing the bottom edge through a spring. The first pressing block is used to abut against the end face of the outer edge of the tool towards the bottom edge. On the inner claw surface, a second pressing block is connected to the limiting groove through a spring. The second pressing block is used to abut against the side surface of the tool towards the claw opening.

[0009] Preferably, inclined surfaces are respectively formed on one side of each of the first pressing block and the second pressing block. The first pressing block and the second pressing block form a trapezoidal structure that is narrow at the top and wide at the bottom.

[0010] Preferably, an outwardly expanding surface extending away from the claw opening is formed adjacent to the inner claw surface on the claw arm.

[0011] Preferably, the second pressing block is located at the edge where the inner claw surface meets the outwardly expanding surface. The first pressing block is arranged adjacent to the inner claw surface and is located at the bottom of the limiting ridge.

[0012] Preferably, the first pressing block and the second pressing block are elastic material blocks.

[0013] Preferably, a fitting groove is formed between the two claw arms of the claw mounting seat. The fitting groove is located at the adjacent end between the two claw arms. A magnet or a suction nozzle is installed in the fitting groove.

[0014] Preferably, relief openings are respectively formed on the limiting ridge and the inner claw surface to accommodate the springs connected to the first pressing block and the second pressing block.

[0015] The present utility model also provides a disc tool magazine for a machining center, which includes a circular tool disc and a plurality of clamping claws as described above. The plurality of clamping claws are respectively locked to the edge of the circular tool disc through screws provided on their claw mounting seats.

[0016] The technical effects achieved by the technical solution of the present utility model mainly include:

[0017] By improving the structure of the clamping claw, a bottom edge and a limiting ridge are formed in a convex manner on the inner claw surface. A first pressing block is connected to the side of the limiting ridge facing the bottom edge through a spring, and abuts against the end face of the outer edge of the tool towards the bottom edge, so that the outer edge of the tool is clamped and fixed between the first pressing block and the bottom edge. And a second pressing block is arranged on the inner claw surface. The second pressing block is used to abut against the side surface of the tool towards the claw opening. The second pressing blocks on the two claw arms cooperate to generate a force that makes the tool move deeper into the claw opening, preventing the tool from falling out of the claw opening. The forces generated by the first pressing block and the second pressing block on the tool are perpendicular to each other and play a complementary role, providing double protection for the fixation of the tool by the clamping claw. The clamping claw is not likely to fall off when the disc tool magazine rotates, avoiding adverse consequences such as shutdown. Description of the Drawings

[0018] Figure 1 Schematic diagram of the tool clamping jaw of the disc tool magazine provided by the embodiment of the present utility model when clamping a tool;

[0019] Figure 2 Corresponding to Figure 1 Partial enlarged view of the circular dotted line frame area A in;

[0020] Figure 3 Connection schematic diagram of the first tightening block in the tool clamping jaw;

[0021] Figure 4 Cross-sectional view of the tool clamping jaw;

[0022] Figure 5 Corresponding to Figure 4 Partial enlarged view of the circular dotted line frame area B in;

[0023] Figure 6 Stereogram of the tool clamping jaw from the perspective of its back;

[0024] Figure 7 Corresponding to Figure 6 Partial enlarged view of the circular dotted line frame area C in;

[0025] Figure 8 Schematic diagram of the structure of the disc tool magazine of the machining center provided by the embodiment of the present utility model.

[0026] Each reference numeral in the above-mentioned drawings is as follows:

[0027] Tool jaw mounting seat 1, jaw opening 101, fitting groove 102, tool jaw arm 2, limiting groove 201, inner jaw surface 2a, outward expanding surface 2b, bottom edge 21, limiting ridge 22, first tightening block 231, second tightening block 232, tool 3, outer edge 31, spring 23, circular tool disc 4. Detailed implementation manners

[0028] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the following will describe the detailed implementation manners of the present utility model in detail with reference to the drawings. Examples of these preferred implementation manners are illustrated in the drawings. The implementation manners of the present utility model shown in the drawings and described according to the drawings are only exemplary, and the present utility model is not limited to these implementation manners.

[0029] Here, in order to avoid obscuring the present utility model due to unnecessary details, only the structures and / or processing steps closely related to the solution of the present utility model are shown in the drawings, and other details with little relevance are omitted.

[0030] As Figure 1 And Figure 2As shown in the figure, an embodiment of the present utility model provides a tool clamping jaw for a disc tool magazine, which includes a tool jaw mounting seat 1 and a pair of tool jaw arms 2 connected to the tool jaw mounting seat 1. The tool jaw arms 2 are arc-shaped, and the space between the two tool jaw arms 2 forms a jaw opening 101 for clamping a tool 3. The arc surface of the tool jaw arm 2 facing the jaw opening 101 is an inner jaw surface 2a. A bottom edge 21 and a limiting ridge 22 are formed by protrusions on the inner jaw surface 2a. Both the bottom edge 21 and the limiting ridge 22 extend along the circumferential direction of the inner jaw surface 2a to form an arc-shaped structure. The bottom edge 21 is located on one side edge of the inner jaw surface 2a, and the limiting ridge 22 is located in the middle of the inner jaw surface 2a. A limiting groove 201 is formed between the limiting ridge 22 and the bottom edge 21. An outer edge 31 is provided outside the tool 3, and when the tool 3 enters the jaw opening 101, the outer edge 31 is adapted to be snapped into the limiting groove 201.

[0031] Among them, in combination Figures 2 to 5 As shown in the figure, a first pressing block 231 is connected to the surface of the limiting ridge 22 facing the bottom edge 21 through a spring 23. The first pressing block 231 is used to abut against the end face of the outer edge 31 of the tool 3 towards the bottom edge 21. A second pressing block 232 is connected to the inner jaw surface 2a in the limiting groove 201 through a spring 23. The second pressing block 232 is used to abut against the side surface of the tool 3 towards the jaw opening 101.

[0032] When the tool 3 enters the jaw opening 101 to be clamped and fixed by the tool jaw arms 2, the outer edge 31 of the tool 3 will be snapped into the limiting groove 201. The springs connected to the first pressing block 231 and the second pressing block 232 are compressed to generate a reaction force. The first pressing block 231 abuts against the end face of the outer edge 31 of the tool 3, pressing the outer edge 31 of the tool 3 towards the bottom edge 21. The outer edge 31 of the tool 3 is thus clamped and fixed between the first pressing block 231 and the bottom edge 21. The second pressing block 232 is provided on the inner jaw surface 2a, and the second pressing block 232 abuts against the side surface of the outer edge 31 of the tool 3, pressing the tool 3 towards the jaw opening 101 and towards the center. In combination Figure 6 and Figure 7 As shown in the figure, the second pressing blocks 232 on the two tool jaw arms 2 cooperate simultaneously to generate a force that makes the tool 3 move deeper into the jaw opening 101, preventing the tool 3 from falling out of the jaw opening 101. The forces generated by the first pressing block 231 and the second pressing block 232 on the tool 3 are perpendicular to each other. With the cooperation of the two with different force directions, the tool 3 can be stably fixed on the tool clamping jaw. Even when the disc tool magazine is working and the tool clamping jaw needs to rotate continuously, the tool is not likely to fall off, maintaining the continuous and orderly progress of the processing operation.

[0033] Moreover, the fixing structures such as the first pressing block 231, the second pressing block 232, the bottom edge 21, and the limiting ridge 22 on the claw arm 2 are not complex. The clamping claw achieves a stable installation effect on the tool 3 with a simple structure, with low cost, which is conducive to mass production.

[0034] The shape of the outer edge 31 of the tool 3 needs to fit the limiting groove 201 to ensure stable abutment. Correspondingly, the outer edge 31 of the tool 3 is in the shape of an annular structure extending from the side surface of the tool 3. One side of each of the first pressing block 231 and the second pressing block 232 is respectively formed with an inclined surface. The first pressing block 231 and the second pressing block 232 form a trapezoidal structure that is narrower at the top and wider at the bottom. With the above structural settings, when the outer edge 31 of the tool 3 is inserted into the limiting groove 201, it first contacts the inclined surfaces of the first pressing block 231 and the second pressing block 232 respectively, and then contacts the tops of the first pressing block 231 and the second pressing block 232, so that the outer edge 31 of the tool 3 can enter the interior of the limiting groove 201 more smoothly.

[0035] In this embodiment, the sizes of the first pressing block 231, the second pressing block 232, the bottom edge 21, and the limiting ridge 22 need to be designed according to the actual processing requirements, and are set by themselves on the premise of being matched with each other to achieve the above-mentioned fixing effect on the tool 3, and it is necessary to facilitate production.

[0036] An outwardly expanding surface 2b extending away from the claw opening 101 is formed on the claw arm 2 adjacent to the inner claw surface 2a. The extension of the outwardly expanding surface 2b away from the claw opening 101 will enable the structure such as the manipulator that holds the tool 3 before the tool 3 enters the claw opening 101 to have a larger position adjustment space, and the outwardly expanding surface 2b can play a role in guiding the tool 3 to align with the claw opening 101.

[0037] Specifically, the second pressing block 232 is located at the edge where the inner claw surface 2a meets the outwardly expanding surface 2b, and the first pressing block 231 is arranged adjacent to the inner claw surface 2a and is located at the bottom of the limiting ridge 22. The closer the second pressing block 232 is to the lower edge of the claw opening 101, the more the acting force of the second pressing block 232 on the side surface of the tool 3 tends to be in the vertically upward direction, which is opposite to the falling direction of the tool 3, which is beneficial to the fixing effect exerted by the second pressing block 232. And the first pressing block 231 is arranged adjacent to the inner claw surface 2a, so that the first pressing block 231 can have a sufficient width range for setting in the limited space of the inner claw surface 2a.

[0038] In order to prevent the structure of the tool 3 from being scratched when being pressed, and in order to improve the pressing effect of the first pressing block 231 and the second pressing block 232 on the tool 3, the first pressing block 231 and the second pressing block 232 are elastic material blocks.

[0039] Further, a fitting groove 102 is formed between the two cutter claw arms 2 of the cutter claw mounting base 1. The fitting groove 102 is located at the adjacent ends between the two cutter claw arms 2. A magnet or a pneumatic suction nozzle is installed in the fitting groove 102. The magnet can adsorb the metal structure on the cutter 3, and the pneumatic suction nozzle can tightly suck the side surface of the cutter 3, further assisting in improving the stability of the cutter 3 on the clamping cutter claw.

[0040] In this embodiment, relief openings are respectively formed in the limiting ridge 22 and the inner claw surface 2a to accommodate the spring 23 connected to the first pressing block 231 and the second pressing block 232, and the relief openings can also allow the first pressing block 231 and the second pressing block 232 to move.

[0041] The present utility model also provides a disc tool magazine for a machining center, as Figure 8 shown. The disc tool magazine of the machining center includes a circular tool disc 4 and a plurality of clamping cutter claws as described above. The plurality of clamping cutter claws are respectively locked to the edge of the circular tool disc 4 by screws provided on their cutter claw mounting bases 1.

[0042] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the element.

[0043] The above are only specific embodiments of the present application. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A clamping jaw of a disc tool magazine, characterized in that, It includes a cutter claw mounting base (1) and a pair of cutter claw arms (2) connected to the cutter claw mounting base (1). The cutter claw arms (2) are arc-shaped. The space between the two cutter claw arms (2) forms a claw opening (101) for clamping a cutter (3). The arc surface of the cutter claw arm (2) facing the claw opening (101) is an inner claw surface (2a). A bottom edge (21) and a limiting ridge (22) are formed by protrusions on the inner claw surface (2a). Both the bottom edge (21) and the limiting ridge (22) extend along the circumferential direction of the inner claw surface (2a) to form an arc-shaped structure. The bottom edge (21) is located on one side edge of the inner claw surface (2a), and the limiting ridge (22) is located in the middle of the inner claw surface (2a). A limiting groove (201) is formed between the limiting ridge (22) and the bottom edge (21). An outer edge (31) is provided outside the cutter (3), and when the cutter (3) enters the claw opening (101), the outer edge (31) is configured to be snapped into the limiting groove (201). Wherein, a first pressing block (231) is connected to the surface of the limiting ridge (22) facing the bottom edge (21) through a spring (23). The first pressing block (231) is used to abut against the end face of the outer edge (31) of the cutter (3) towards the bottom edge (21). A second pressing block (232) is connected to the inner claw surface (2a) in the limiting groove (201) through a spring (23). The second pressing block (232) is used to abut against the side face of the cutter (3) towards the claw opening (101).

2. The clamping jaw of the disc tool magazine according to claim 1, characterized in that, Respective inclined surfaces are formed on one side of the first pressing block (231) and the second pressing block (232). The first pressing block (231) and the second pressing block (232) form a trapezoidal structure that is narrower at the top and wider at the bottom.

3. The clamping jaw of the disc tool magazine according to claim 1, characterized in that An outer expanding surface (2b) that extends away from the claw opening (101) is formed adjacent to the inner claw surface (2a) on the cutter claw arm (2).

4. The clamping jaw of the disc tool magazine according to claim 3, wherein, The second pressing block (232) is located at the edge where the inner claw surface (2a) meets the outer expanding surface (2b). The first pressing block (231) is disposed adjacent to the inner claw surface (2a) and is located at the bottom of the limiting ridge (22).

5. The clamping jaw of the disc tool magazine according to claim 1, characterized in that The first pressing block (231) and the second pressing block (232) are elastic material blocks.

6. The clamping jaw of the disc tool magazine according to claim 1, characterized in that, An accessory slot (102) is provided between the two cutter claw arms (2) on the cutter claw mounting base (1). The accessory slot (102) is located at the adjacent ends between the two cutter claw arms (2). A magnet or a suction nozzle is installed in the accessory slot (102).

7. The clamping jaw of the disc tool magazine according to claim 1, characterized in that, Relief openings are respectively provided on the limiting ridge (22) and the inner claw surface (2a) to accommodate the springs (23) connected to the first pressing block (231) and the second pressing block (232).

8. A disc tool magazine of a machining center, characterized in that, It includes a circular cutter disc (4) and a plurality of cutter clamping claws as described in any one of claims 1 to 7. The plurality of cutter clamping claws are respectively locked to the edge of the circular cutter disc (4) through screws provided on their cutter claw mounting bases (1).

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