Cutter for three-axis machining center and clamping device of cutter

Abstract

The utility model relates to the technical field of machining tools, and particularly discloses a cutter for a three-axis machining center and a clamping device of the cutter. A cutter clamping device for a three-axis machining center comprises a mounting box, clamping blocks are fixedly mounted at the two ends of the mounting box, grooves are formed in the side walls of the two clamping blocks, the opening directions of the two grooves are opposite, and limiting rods are arranged on the inner walls of the sides, close to the mounting box, of the grooves in a penetrating and sliding mode; and the limiting rod penetrates through the side wall of the mounting box and is in sliding connection with the side wall of the mounting box. According to the tool changing mechanism, the situation that the tool is separated due to rotation of the whole tool changing mechanism can be avoided, and potential safety hazards caused by the fact that the tool is thrown out are eliminated.

Description

Technical Field

[0001] The utility model relates to the technical field, and particularly relates to a tool for a three-axis machining center and a clamping device thereof. Background Art

[0002] With the development of science and technology and the rise and continuous maturity of the world's advanced manufacturing technology, higher requirements are put forward for numerical control machining technology; the application of technologies such as ultra-high-speed cutting and ultra-precision machining puts forward higher performance indexes for the numerical control system, servo performance, spindle drive, machine tool structure, etc. of numerical control machine tools; the rapid development of FMS and the continuous maturity of CIMS will put forward higher requirements for technologies such as the reliability, communication function, artificial intelligence and adaptive control of numerical control machine tools. With the development of microelectronics and computer technology, the performance of numerical control systems is becoming increasingly perfect, and the application fields of numerical control technology are expanding day by day.

[0003] A numerical control milling machine is an automatic processing equipment developed on the basis of a general milling machine. The processing technologies of the two are basically the same, and the structures are also somewhat similar. Numerical control milling machines are divided into two categories: those without a tool magazine and those with a tool magazine. Among them, the numerical control milling machine with a tool magazine is also called a machining center. Compared with machining centers with more axes, an advantage of a three-axis machining center is its compact structure. Since they occupy less space in the workshop, the space utilization rate of three-axis machining centers is higher. In addition, these systems replace a variety of other tools, thus further reducing the space occupied in the working area. The machine occupies less space, and the operator will have more moving space, which can improve work efficiency and comfort in the working environment.

[0004] In addition to being able to achieve multi-angle and high-efficiency machining, a three-axis machining center can also perform automatic tool change according to actual needs. The tool change process cannot do without the participation of a manipulator. The specific tool change operation is as follows: select a tool in the tool magazine and change the tool position, and then the two ends of the manipulator respectively clamp the tools on the spindle and the tool magazine. The manipulator rotates to realize the swapping and installation of the old and new tools. However, in the prior art, the manipulator clamps and locks the tool mainly through a spring cooperating with a movable pin. Frequent clamping actions easily cause the spring to be fatigued and damaged, and then cause the situation of insecure clamping. In this case, when the manipulator rotates, the tool is likely to fall off and be thrown out, so there are great safety hazards. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a tool for a three-axis machining center and a clamping device thereof, and solve the above technical problems:

[0006] The purpose of the utility model can be realized by the following technical solutions:

[0007] A tool clamping device for a three-axis machining center, comprising an installation box. Both ends of the installation box are fixedly installed with clamping blocks. The side walls of the two clamping blocks are both provided with grooves, and the opening directions of the two grooves are opposite. A limiting rod penetrates and slides in the inner wall of the groove close to the installation box side. The limiting rod penetrates the side wall of the installation box and is slidably connected to the side wall of the installation box.

[0008] As a further technical solution, a rack is provided in the installation box. One end of the rack is fixedly connected to the end of the limiting rod close to the installation box. Both the upper and lower ends of the rack are provided with sliding grooves. The lower end of the installation box is detachably installed with an end cover. Guide rails are fixedly arranged at the bottom of the installation box and the end face of the end cover. The two guide rails are respectively embedded and slidably connected in the two sliding grooves.

[0009] As a further technical solution, a gear is provided in the installation box. The gear is located between the two racks. Both racks are meshed with the gear, and the two racks are centrosymmetric about the axis of the gear.

[0010] As a further technical solution, an installation hole is provided at the center of the gear. A key groove is provided on the side wall of the installation hole. A servo motor is fixedly installed at the lower end of the end cover. The output end of the servo motor is drivingly connected with a rotating shaft. A connecting key is fixedly arranged on the side wall of the rotating shaft. When the rotating shaft is inserted into the installation hole, the connecting key is slidably connected with the key groove along the axis direction of the rotating shaft.

[0011] As a further technical solution, a first limiting strip is fixedly arranged on the inner wall of the groove. A second limiting strip is fixedly arranged on the side of the limiting rod close to the bottom of the groove.

[0012] A tool, the tool comprises a tool shank. A tool bit is installed at the lower end of the tool shank. A connecting head is installed at the upper end of the tool shank. An annular clamping groove is provided on the side wall of the tool shank.

[0013] The beneficial effects of the present utility model:

[0014] Through the setting of the groove on the clamping block of the present utility model, the tool can be placed in the groove to complete the positioning of the tool before clamping. And through the setting of the limiting rod, the limiting rod cooperates with the groove to clamp and fix the tool. The clamping and loosening of the tool are realized by the sliding and telescoping of the limiting rod. The above structure replaces the traditional clamping and locking realized by the spring force, making the clamping more stable, and can avoid the situation that the tool disengages due to the rotation of the entire tool changing mechanism, eliminating the safety hazard caused by the tool being thrown out. Description of the drawings

[0015] The following further describes the present utility model with reference to the drawings.

[0016] Figure 1 It is a three - dimensional structure schematic diagram of a tool clamping device for a three - axis machining center in the present utility model;

[0017] Figure 2 It is a partial structure plan schematic diagram of a tool clamping device for a three - axis machining center in the present utility model;

[0018] Figure 3 It is a three - dimensional structure schematic diagram of another perspective of a tool clamping device for a three - axis machining center in the present utility model;

[0019] Figure 4 It is a three - dimensional structure schematic diagram of a tool in the present utility model.

[0020] Reference numerals: 1, mounting box; 11, end cover; 12, clamping block; 121, groove; 1211, first limiting strip; 13, guide rail; 2, servo motor; 21, gear; 211, mounting hole; 22, rack; 221, sliding groove; 23, limiting rod; 231, second limiting strip; 3, tool shank; 31, tool tip; 32, connecting head; 33, annular clamping groove Specific embodiments

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0022] As Figure 1-2 shown, a tool clamping device for a three - axis machining center includes a mounting box 1. Both ends of the mounting box 1 are fixedly installed with clamping blocks 12. The side walls of the two clamping blocks 12 are both provided with grooves 121, and the opening directions of the two grooves 121 are opposite. A limiting rod 23 is slidably arranged through the inner wall of the groove 121 close to the mounting box 1. The limiting rod 23 penetrates through the side wall of the mounting box 1 and is slidably connected with the side wall of the mounting box 1.

[0023] Through the above technical solution, this embodiment provides a tool clamping device for a three-axis machining center. By setting the groove 121 on the clamping block 12, the tool can be placed in the groove 121 to complete the positioning of the tool before clamping. And by setting the limiting rod 23, the limiting rod 23 cooperates with the groove 121 to clamp and fix the tool, and the clamping and loosening of the tool are realized through the sliding expansion and contraction of the limiting rod 23. Therefore, the clamped and fixed state can avoid the situation of the tool falling off due to the rotation of the entire mechanism, eliminating the safety hazard caused by the tool being thrown out.

[0024] As Figure 3 shown, a rack 22 is arranged in the mounting box 1. One end of the rack 22 is fixedly connected to one end of the limiting rod 23 close to the mounting box 1. Chute 221s are opened at both the upper and lower ends of the rack 22. The lower end of the mounting box 1 is detachably provided with an end cover 11. Guide rails 13 are fixedly arranged at the bottom of the mounting box 1 and the end face of the end cover 11. The two guide rails 13 are respectively inserted into and slidably connected to the two chute 221s.

[0025] Through the above technical solution, this embodiment provides a specific sliding connection method between the limiting rod 23 and the mounting box 1. The limiting rod 23 is fixedly connected to the rack 22, and the sliding installation of the limiting rod 23 is realized through the sliding connection between the rack 22 and the guide rail 13. And the sliding connection between the chute 221 on the rack 22 and the guide rail 13 improves the stability of the sliding connection due to the relatively wide contact surface. In addition, through the detachable connection method between the end cover 11 and the mounting box 1, it is convenient to repair the moving parts in the mounting box 1.

[0026] As Figure 2 shown, a gear 21 is arranged in the mounting box 1. The gear 21 is located between the two racks 22. Both of the two racks 22 are engaged with the gear 21, and the two racks 22 are centrosymmetric about the axis of the gear 21.

[0027] Through the above technical solution, this embodiment provides a structure for driving the movement of the two racks 22. By driving the gear 21 to rotate, the forward and reverse movements of the two racks 22 can be realized. Correspondingly, the loosening and clamping of the old and new tools at both ends of the mounting box 1 are realized.

[0028] As Figure 2-3 shown, a mounting hole 211 is opened at the center of the gear 21. A keyway is provided on the side wall of the mounting hole 211. A servo motor 2 is fixedly installed at the lower end of the end cover 11. The output end of the servo motor 2 is drivingly connected with a rotating shaft. A connecting key is fixedly arranged on the side wall of the rotating shaft. When the rotating shaft is inserted into the mounting hole 211, the connecting key is slidably connected with the keyway along the axis direction of the rotating shaft.

[0029] Through the above technical solution, in this embodiment, the servo motor 2 is used as a driving source to control the forward and reverse rotation of the gear 21. Through the connection method of the keyway and the connection key, the disassembly of the end cover 11 is facilitated.

[0030] As Figure 2-3 shown, a first limiting strip 1211 is fixedly arranged on the inner wall of the groove 121, and a second limiting strip 231 is fixedly arranged on one side of the limiting rod 23 close to the bottom of the groove 121.

[0031] Through the above technical solution, the first limiting strip 1211 and the second limiting strip 231 in this embodiment are used for axially limiting the tool.

[0032] As Figure 4 shown, a tool includes a tool handle 3. A tool head 31 is installed at the lower end of the tool handle 3, a connection head 32 is installed at the upper end of the tool handle 3, and an annular clamping groove 33 is formed in the side wall of the tool handle 3.

[0033] Through the above technical solution, in this embodiment, through the arrangement of the annular clamping groove 33 on the side wall of the tool handle 3, correspondingly, when the tool is clamped, the first limiting strip 1211 and the second limiting strip 231 can be embedded into the annular clamping groove 33, improving the clamping stability. In addition, it should be noted that the connection head 32 is a prior art and is used to connect with the machining spindle of the machining center, which will not be elaborated here.

[0034] The above has described a detailed description of an embodiment of the present invention, but the content described is only the preferred embodiment of the present invention and cannot be considered as used to limit the scope of implementation of the present invention. Any equal changes and improvements made according to the scope of the application of the present invention shall still fall within the scope covered by the patent of the present invention.

Claims

1. A tool clamping device for a three-axis machining center, characterized in that, It includes an installation box (1), clamping blocks (12) are fixedly installed at both ends of the installation box (1), grooves (121) are formed on the side walls of the two clamping blocks (12), and the opening directions of the two grooves (121) are opposite. A limiting rod (23) is penetrated and slidably arranged on the inner wall of the groove (121) close to the installation box (1) side, and the limiting rod (23) penetrates the side wall of the installation box (1) and is slidably connected with the side wall of the installation box (1).

2. The tool clamping device for a three-axis machining center according to claim 1, wherein A rack (22) is arranged in the installation box (1), one end of the rack (22) is fixedly connected with one end of the limiting rod (23) close to the installation box (1), sliding grooves (221) are formed at the upper and lower ends of the rack (22), an end cover (11) is detachably installed at the lower end of the installation box (1), guide rails (13) are fixedly arranged at the bottom of the installation box (1) and the end face of the end cover (11), and the two guide rails (13) are respectively embedded and slidably connected in the two sliding grooves (221).

3. The tool clamping device for a three-axis machining center according to claim 2, characterized in that, A gear (21) is arranged in the installation box (1), the gear (21) is located between the two racks (22), the two racks (22) are both meshed with the gear (21), and the two racks (22) are centrosymmetric about the axis of the gear (21).

4. A tool clamping device for a three-axis machining center according to claim 3, characterized in that, An installation hole (211) is formed in the center of the gear (21), a key groove is arranged on the side wall of the installation hole (211), a servo motor (2) is fixedly installed at the lower end of the end cover (11), the output end of the servo motor (2) is in transmission connection with a rotating shaft, a connection key is fixedly arranged on the side wall of the rotating shaft, and when the rotating shaft is inserted into the installation hole (211), the connection key is slidably connected with the key groove along the axis direction of the rotating shaft.

5. A tool clamping device for a three-axis machining center according to claim 1, characterized in that, A first limiting strip (1211) is fixedly arranged on the inner wall of the groove (121), and a second limiting strip (231) is fixedly arranged on one side of the limiting rod (23) close to the bottom of the groove (121).

6. A tool for a tool clamping device used in a three-axis machining center as described in any one of claims 1-5, characterized in that, The tool includes a tool handle (3), a tool bit (31) is installed at the lower end of the tool handle (3), a connection head (32) is installed at the upper end of the tool handle (3), and an annular clamping groove (33) is formed on the side wall of the tool handle (3).

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