High-efficiency automatic tool changing and grinding equipment

Abstract

The utility model discloses a high-efficiency automatic tool changing and polishing device which comprises a mounting seat, a chuck portion mounted at the bottom of the mounting seat, a rotating shaft mounted in the center of the chuck portion and driven by a motor, a through hole formed in the rotating shaft, a locking chamfer arranged at the lower end of the through hole, and a locking sleeve slidably mounted in the through hole and capable of contracting towards the center. An inclined part is arranged on the outer side of the lower end of the locking sleeve, the locking sleeve is provided with a connecting rod reset through a cutter locking spring, a locking air cylinder is installed on the top of the installation base, a telescopic shaft is arranged on the locking air cylinder, and the telescopic shaft stretches out to push the connecting rod, so that the inclined part is separated from the locking chamfer, the locking sleeve is reset outwards, and the cutter automatically falls off from the locking sleeve. The telescopic shaft retracts, the cutter locking spring pushes the connecting rod to reset, the locking sleeve shrinks towards the center along the inclined part and the locking chamfer, the cutter is fastened, the cutter changing efficiency is high, the automation degree is high, meanwhile, the locking difference caused by manual operation can be reduced, and the labor intensity of operators is reduced.

Description

Technical Field

[0001] The utility model relates to a tool clamping device for machining, in particular to a high-efficiency automatic tool changing and grinding device. Background Art

[0002] Casting is a process of pouring liquid metal into a pre-prepared mold, and obtaining a casting with a predetermined shape, size and performance after cooling, solidification and cleaning. It can manufacture parts with complex shapes and can adapt to various metal materials. Compared with some other manufacturing processes, the cost of mass production is relatively low. However, the surface of the casting often has defects such as roughness, sand adhesion, oxide scale and residual casting flash. Polishing and grinding are needed to remove these surface defects, make the surface of the casting smooth and flat, and improve its appearance quality. The commonly used method is to use machine tools, manually replace tools of different coarseness and fineness, and grind the castings multiple times. When replacing the tool, it is necessary to use appropriate tools (such as wrenches), loosen the chuck, take out the old tool, put in the new tool, and finally tighten the chuck. The overall operation is relatively cumbersome. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, the utility model provides a high-efficiency automatic tool changing and grinding device.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A high-efficiency automatic tool-changing and grinding equipment comprises a mounting seat, a chuck portion is mounted on the bottom of the mounting seat, a rotating shaft driven by a motor is mounted at the center of the chuck portion, a through hole is arranged in the rotating shaft which penetrates through the upper and lower ends, a locking chamfer is arranged at the lower end of the through hole, a locking sleeve which can be retracted toward the center is slidably mounted in the through hole, an inclined portion is arranged on the outer side of the lower end of the locking sleeve corresponding to the locking chamfer, a connecting rod which is reset by a knife-locking spring is mounted on the top of the locking sleeve, the upper end of the connecting rod extends out from the upper end of the through hole, a locking cylinder is mounted on the top of the mounting seat, and a telescopic shaft for pushing the connecting rod is arranged on the locking cylinder.

[0006] A heat-conducting sleeve is installed in the chuck portion, at least one bearing is installed in the heat-conducting sleeve, and the rotating shaft is installed on the inner ring of the bearing.

[0007] The outer side of the heat-conducting sleeve is provided with a continuous spiral heat dissipation groove, and the spiral heat dissipation groove and the inner wall of the chuck part are combined to form a heat dissipation duct. The outer side of the chuck part is provided with an air inlet and an air outlet corresponding to the air inlet end and the air outlet end of the heat dissipation duct, and the air inlet pipe is connected to a cooling fan.

[0008] An upper limit piece is installed at the upper end of the connecting rod, and a lower limit piece is installed below the rotating shaft located at the upper limit piece. An annular mounting groove is formed between the upper limit piece and the lower limit piece, and the knife locking spring is installed in the mounting groove.

[0009] A floating cylinder is installed between the bottom of the locking cylinder and the top surface of the mounting seat to push the mounting seat to move up and down; a plurality of guide pillars are installed circumferentially on the top surface of the mounting seat, and guide holes are provided in the locking cylinder corresponding to the guide pillars, and the guide pillars are inserted into the guide holes.

[0010] A dustproof bellows is installed between the lower end of the locking cylinder and the top surface of the mounting seat.

[0011] The mounting seat is provided with a first mounting portion and a second mounting portion, the chuck portion is mounted on the second mounting portion, the motor is mounted on the first mounting portion, a driving wheel is mounted on the rotating shaft of the motor, a driven wheel is mounted on the rotating shaft corresponding to the driving wheel, and the driving wheel and the driven wheel are connected via a transmission belt.

[0012] The mounting seat comprises an upper shell and a lower shell, a cavity is arranged between the upper shell and the lower shell, and the driving wheel and the driven wheel are mounted in the cavity.

[0013] The beneficial effects of the utility model are as follows: a chuck part is installed at the bottom of the mounting seat, and a rotating shaft driven by a motor is installed in the center of the chuck part, and a through hole is arranged in the rotating shaft that penetrates through the upper and lower ends, and a locking chamfer is arranged at the lower end of the through hole, and a locking sleeve that can be contracted toward the center is slidably installed in the through hole, and an inclined portion is arranged on the outer side of the lower end of the locking sleeve corresponding to the locking chamfer, and a connecting rod reset by a knife locking spring is installed on the top of the locking sleeve, and the upper end of the connecting rod extends from the upper end of the through hole, and a locking cylinder is installed on the top of the mounting seat, and a telescopic shaft for pushing the connecting rod is provided on the locking cylinder, and the connecting rod is pushed by extending the telescopic shaft to separate the inclined portion and the locking chamfer, and the locking sleeve is reset outward, and the tool automatically falls from the locking sleeve, and the telescopic shaft is retracted, and the locking spring pushes the connecting rod to reset, and the locking sleeve shrinks toward the center along the inclined portion and the locking chamfer to tighten the tool, and the tool changing efficiency is high and the degree of automation is high. At the same time, it can reduce the locking difference caused by manual operation and reduce the labor intensity of the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0015] Figure 1 It is a structural diagram of the utility model;

[0016] Figure 2 It is a cross-sectional view of the utility model;

[0017] Figure 3 It is an exploded view of the utility model;

[0018] Figure 4 It is a cross-sectional exploded view of the rotating shaft and the locking sleeve;

[0019] Figure 5 It is a structural diagram of the thermal sleeve. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be noted that the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

[0021] It should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present invention.

[0022] Some embodiments of the present invention are described below in conjunction with the accompanying drawings.

[0023] Reference Figure 1-5 , a high-efficiency automatic tool changing and grinding equipment, comprising a mounting seat 1, a chuck portion 2 is mounted at the bottom of the mounting seat 1, a rotating shaft 12 driven by a motor 11 is mounted at the center of the chuck portion 2, a through hole 3 penetrating the upper and lower ends is arranged in the rotating shaft 12, a locking chamfer 4 is arranged at the lower end of the through hole 3, a locking sleeve 5 that can be retracted toward the center is slidably mounted in the through hole 3, an inclined portion 6 is arranged at the outer side of the lower end of the locking sleeve 5 corresponding to the locking chamfer 4, a connecting rod 8 reset by a knife locking spring 7 is mounted at the top of the locking sleeve 5, the upper end of the connecting rod 8 extends from the upper end of the through hole 3, a locking cylinder 9 is mounted at the top of the mounting seat 1, the locking cylinder 9 is mounted on a machine tool, such as a robot arm, and the locking cylinder 9 is driven by the robot arm The cylinder 9 moves, thereby driving the automatic tool changing device to move as a whole. The locking cylinder 9 is provided with a telescopic shaft 10 for pushing the connecting rod 8. The connecting rod is pushed by extending the telescopic shaft, so that the inclined portion is separated from the locking chamfer, and the locking sleeve is reset outward (the locking sleeve itself has a certain deformation recovery ability). The tool automatically falls out of the locking sleeve, and the connecting rod is reset by retracting the telescopic shaft. The locking spring pushes the connecting rod to reset, and the inclined portion slides along the locking chamfer, so that the locking sleeve shrinks toward the center to tighten the tool. The locking sleeve 5 is provided with a notch 25, and the notch 25 provides space for the locking sleeve 5 to shrink toward the center. The tool changing efficiency is high and the degree of automation is high. At the same time, it can reduce the locking difference caused by manual operation and reduce the labor intensity of the operator.

[0024] A cutter disc is placed outside the processing range, and tools of different coarseness and fineness are placed on the cutter disc in a regular pattern. When the tool needs to be replaced, the robotic arm drives the automatic tool changer to move to the corresponding position. If the tool is already installed on the automatic tool changer, the old tool is put back in place and then replaced with a new one to continue the grinding and polishing operation. It has a high degree of automation, realizes unmanned or less-manned production operations, and is easy to integrate with the automatic control system.

[0025] A heat-conducting sleeve 13 is installed in the chuck portion 2, and at least one bearing 15 is installed in the heat-conducting sleeve 13. The rotating shaft 12 is installed on the inner ring of the bearing 15. A continuous spiral heat dissipation groove 14 is arranged on the outer side of the heat-conducting sleeve 13. The spiral heat dissipation groove 14 and the inner wall of the chuck portion 2 are surrounded to form a heat dissipation duct. An air inlet and an air outlet are arranged on the outer side of the chuck portion 2 corresponding to the air inlet end and the air outlet end of the heat dissipation duct. The air inlet pipe is connected to a cooling fan. When the rotating shaft 12 rotates at a high speed, a large amount of heat is generated, which is transferred to the heat dissipation duct through the heat-conducting sleeve 13. A large amount of low-temperature air (which can be air at room temperature or air cooled by a compressor) is sent to the air inlet through the cooling fan to take away a large amount of heat from the air outlet.

[0026] An upper limit member 16 is installed at the upper end of the connecting rod 8, and a lower limit member 17 is installed at the lower part of the rotating shaft 12 located below the upper limit member 16. An annular mounting groove is formed between the upper limit member 16 and the lower limit member 17, and the knife lock spring 7 is installed in the mounting groove. The knife lock spring 7 can be a spiral spring or a disc spring. In this embodiment, a disc spring is adopted, and the spring has a cone structure as a whole. Two disc springs are placed opposite to each other (that is, in the cone structure, the end with a larger diameter is placed against each other, so that the two disc springs form a diamond-like structure, such as Figure 2 , 3 As shown in the figure, when the spring is squeezed, the spring changes from a conical structure to a flat structure. When the spring is released, the spring returns to its original shape and generates thrust.

[0027] In actual processing, the casting may not be a complete plane. Therefore, in a grinding operation, it is necessary to provide a pressure to the tool so that the tool can always fit the casting. This pressure is not constant and needs to be adjusted according to different materials, different grinding degrees, etc. A floating cylinder 20 is installed between the bottom of the locking cylinder 9 and the top surface of the mounting seat 1 to push the mounting seat 1 up and down; a plurality of guide pillars 18 are installed on the top surface of the mounting seat 1 along the circumferential direction, and guide holes are provided in the locking cylinder 9 corresponding to the guide pillars 18. The guide pillars 18 are inserted in the guide holes. The mounting seat 1 cooperates with the guide pillars 18 and the guide holes. The floating cylinder 20 moves up and down, thereby achieving the effect of making the tool always fit with the casting. A pulling force is provided to the mounting seat 1 through the floating cylinder 20, thereby reducing the pressure exerted by the mounting seat 1 on the casting (the gravity of the mounting seat 1 is the sum of the gravity of the mounting seat 1 itself and all parts installed on the mounting seat 1, and the gravity is equal to the sum of the pulling force provided by the floating cylinder 20 and the reaction force of the casting on the tool). The pulling force provided by the floating cylinder 20 is adjustable. It can be set and adjusted through the control panel of the machine tool according to different materials and different polishing degrees, so the actual pressure of the tool on the casting can be adjusted.

[0028] A dustproof bellows 21 is installed between the lower end of the locking cylinder 9 and the top surface of the mounting seat 1 .

[0029] The mounting seat 1 is provided with a first mounting portion and a second mounting portion, the chuck portion 2 is mounted on the second mounting portion, the motor 11 is mounted on the first mounting portion, a driving wheel 22 is mounted on the rotating shaft of the motor 11, a driven wheel 23 is mounted on the rotating shaft 12 corresponding to the driving wheel 22, and the driving wheel 22 and the driven wheel 23 are connected through a transmission belt 24.

[0030] The mounting base 1 includes an upper shell 19 and a lower shell 26 , a cavity is provided between the upper shell 19 and the lower shell 26 , and the driving wheel 22 and the driven wheel 23 are installed in the cavity.

[0031] The transmission parts are wrapped as a whole by the dustproof bellows 21, the upper shell and the lower shell, etc., to prevent external dust from entering and to prevent internal lubricating oil from splashing outward, thereby providing strong protection for the transmission part of this product.

[0032] In the present invention, the term "plurality" means two or more than two, unless otherwise clearly defined. The term "and / or" used herein includes any and all combinations of one or more related listed items. The terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "connect" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0033] It should be noted that when an element is referred to as being "assembled on", "installed on", "fixed on" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0034] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0035] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A high-efficiency automatic tool changing and grinding device, comprising a mounting seat (1), characterized in that A chuck portion (2) is mounted at the bottom of the mounting seat (1), a rotating shaft (12) driven by a motor (11) is mounted at the center of the chuck portion (2), a through hole (3) penetrating the upper and lower ends is arranged in the rotating shaft (12), a locking chamfer (4) is arranged at the lower end of the through hole (3), a locking sleeve (5) which can be retracted toward the center is slidably mounted in the through hole (3), an inclined portion (6) is arranged at the outer side of the lower end of the locking sleeve (5) corresponding to the locking chamfer (4), a connecting rod (8) which is reset by a knife locking spring (7) is mounted at the top of the locking sleeve (5), the upper end of the connecting rod (8) protrudes from the upper end of the through hole (3), a locking cylinder (9) is mounted at the top of the mounting seat (1), and a telescopic shaft (10) for pushing the connecting rod (8) is arranged on the locking cylinder (9).

2. The high-efficiency automatic tool changing and grinding equipment according to claim 1 is characterized in that A heat-conducting sleeve (13) is installed in the chuck portion (2), at least one bearing (15) is installed in the heat-conducting sleeve (13), and the rotating shaft (12) is installed on the inner ring of the bearing (15).

3. The high-efficiency automatic tool changing and grinding equipment according to claim 2 is characterized in that The outer side of the heat-conducting sleeve (13) is provided with continuous spiral heat dissipation grooves (14), and the spiral heat dissipation grooves (14) and the inner wall of the chuck portion (2) are combined to form a heat dissipation air duct. The outer side of the chuck portion (2) is provided with an air inlet and an air outlet corresponding to the air inlet end and the air outlet end of the heat dissipation air duct, and the air inlet duct is connected to a cooling fan.

4. The high-efficiency automatic tool changing and grinding equipment according to claim 1 is characterized in that An upper limit member (16) is installed at the upper end of the connecting rod (8), and a lower limit member (17) is installed at the rotating shaft (12) below the upper limit member (16). An annular mounting groove is formed between the upper limit member (16) and the lower limit member (17), and the knife locking spring (7) is installed in the mounting groove.

5. The high-efficiency automatic tool changing and grinding equipment according to claim 1 is characterized in that A floating cylinder (20) is installed between the bottom of the locking cylinder (9) and the top surface of the mounting seat (1) to push the mounting seat (1) to move up and down; a plurality of guide pillars (18) are installed circumferentially on the top surface of the mounting seat (1); guide holes are provided in the locking cylinder (9) corresponding to the guide pillars (18), and the guide pillars (18) are inserted into the guide holes.

6. The high-efficiency automatic tool changing and grinding equipment according to claim 1 or 5, characterized in that A dustproof bellows (21) is installed between the lower end of the locking cylinder (9) and the top surface of the mounting seat (1).

7. The high-efficiency automatic tool changing and grinding equipment according to claim 1 is characterized in that The mounting seat (1) is provided with a first mounting portion and a second mounting portion, the chuck portion (2) is mounted on the second mounting portion, the motor (11) is mounted on the first mounting portion, a driving wheel (22) is mounted on the rotating shaft of the motor (11), a driven wheel (23) is mounted on the rotating shaft (12) corresponding to the driving wheel (22), and the driving wheel (22) and the driven wheel (23) are connected to each other by a transmission belt (24).

8. The high-efficiency automatic tool changing and grinding equipment according to claim 7 is characterized in that The mounting seat (1) comprises an upper shell and a lower shell, a cavity is provided between the upper shell and the lower shell, and the driving wheel (22) and the driven wheel (23) are mounted in the cavity.

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