Four-axis internal expansion clamping device

Abstract

The utility model discloses a four-axis internal expansion clamping device which comprises a positioning plate, a clamping plate, a clamping plate, a clamping plate and a clamping plate. The positioning plate is provided with two vertically-arranged positioning through holes. The two internal expansions are in one-to-one correspondence with the two positioning through holes and are communicated with the two positioning through holes, and the two internal expansions are fixedly arranged on the top surface of the positioning plate; the pressing plate is movably arranged below the positioning plate, and a connecting through hole matched with the positioning through hole is formed in the pressing plate; the two screw rods are inserted into the positioning through holes and the connecting through holes, the upper end of each screw rod is fixedly provided with a pressing column matched with the corresponding internal expansion part, and the lower end of each screw rod is fixedly connected with the pressing plate through a nut; the four-axis clamping jaw provides driving force for the pressing plate, transmission is achieved through the pressing plate, the threaded rod and the pressing column, and internal expansion is tensioned or loosened. The device has the advantages of high production efficiency, simple overall structure, low manufacturing cost, simplicity and safety in operation and the like.

Description

Technical Field

[0001] The utility model relates to the field of workpiece clamping, and more specifically, to a four-axis internal expansion clamping device. Background Art

[0002] Four-axis internal expansion clamping devices are used in four-axis machining centers. They work with the four-axis clamping jaws to clamp products through internal expansion, facilitating all-around processing. However, existing internal expansion clamping devices, such as those described in utility model patent authorization number CN217315937 U, can only clamp one product at a time, not two products simultaneously. This does not meet the requirements of existing production lines, resulting in mismatches between process steps and low production efficiency. Utility Model Content

[0003] One purpose of the present utility model is to provide a four-axis internal expansion clamping device to at least solve the above-mentioned problem.

[0004] In order to achieve the purpose and other advantages of the present invention, a four-axis internal expansion clamping device is provided, including: a positioning plate, which is provided with two vertically arranged positioning through holes; two internal expansions, which correspond to and are connected with the two positioning through holes one by one, and the two internal expansions are fixed on the top surface of the positioning plate; a pressure plate, which is movably arranged below the positioning plate, and the pressure plate is provided with a connecting through hole that cooperates with the positioning through hole; two screw rods, which are inserted into the positioning through hole and the connecting through hole, and the upper end of each screw rod is fixed with a pressure column that cooperates with the internal expansion, and the lower end is fixedly connected to the pressure plate by a nut; wherein the pressure plate is provided with a driving force by the four-axis clamp, and is transmitted through the pressure plate, screw rod and pressure column to tighten or loosen the internal expansion.

[0005] Preferably, a pressure block is fixed on the inner side wall of the four-axis clamp, the bottom surface of the pressure block is a first inclined surface inclined inward and upward, and the top surface of the pressure plate is provided with second inclined surfaces inclined outward and downward to cooperate with the first inclined surface.

[0006] Preferably, at least two vertically arranged upright plates are provided below the pressure plate, and vertically arranged guide grooves are provided on the tops of the upright plates. Elastic members are embedded in the guide grooves, and the tops of the elastic members are connected to the bottom surface of the pressure plate.

[0007] Preferably, the pressure plate is provided with a guide through hole that cooperates with the guide groove, a guide rod is inserted into the guide through hole, and the upper end of the guide rod is fixedly connected to the positioning plate.

[0008] Preferably, the elastic member is a spring.

[0009] Preferably, a horizontally arranged bottom plate is fixedly provided below the vertical plate.

[0010] Preferably, the middle portion of the inner expansion has a through hole running through in the vertical direction, and the top inner wall of the through hole is an inverted frustum structure, and the top outer wall of the pressure column is an inverted frustum structure matching the top inner wall of the inner expansion.

[0011] The utility model has at least the following beneficial effects:

[0012] The four-axis internal expansion clamping device of the utility model has a one-out-two structure, which can clamp two products at the same time, thereby improving production efficiency; the overall structure of the device is simple, the production cost is low, and it can be used for both general and special purposes; the clamping and relaxation of the internal expansion can be controlled by driving the four-axis clamping jaws, and the operation is simple and safe, and no professional operation is required.

[0013] Other advantages, objectives and features of the present invention will be reflected in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic cross-sectional view of a four-axis internal expansion clamping device according to an embodiment of the present invention;

[0015] Figure 2 It is an exploded view of a four-axis internal expansion clamping device according to another embodiment of the present invention. DETAILED DESCRIPTION

[0016] The present invention will be further described in detail below with reference to the embodiments and drawings so that those skilled in the art can implement the invention with reference to the description.

[0017] It should be understood that terms such as “having”, “including” and “comprising” used herein do not preclude the existence or addition of one or more other elements or combinations thereof.

[0018] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials are commercially available unless otherwise specified; in the description of the present invention, the terms "horizontal", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0019] like Figure 1 、 Figure 2As shown, an embodiment of the present invention provides a four-axis internal expansion clamping device, comprising: a positioning plate 1, which is provided with two vertically arranged positioning through holes; two internal expansions 2, which correspond to and are connected with the two positioning through holes one by one, and the two internal expansions 2 are fixed on the top surface of the positioning plate 1; a pressure plate 3, which is movably arranged below the positioning plate 1, and the pressure plate 3 is provided with a connecting through hole that cooperates with the positioning through hole; two screws 4, which are inserted into the positioning through hole and the connecting through hole, and the upper end of each screw 4 is fixed with a pressure column 5 that cooperates with the internal expansion 2, and the lower end is fixedly connected to the pressure plate 3 by a nut 6; wherein, the pressure plate 3 is provided with a driving force by a four-axis clamp 7, and is transmitted through the pressure plate 3, the screw 4 and the pressure column 5 to tighten or loosen the internal expansion 2.

[0020] In the above embodiment, the four-axis internal expansion clamping device includes a positioning plate 1, two internal expansion plates 2, a pressure plate 3, two screws 4, two pressure columns 5 and two nuts 6. The positioning plate 1 is arranged horizontally and has two vertical positioning holes. Preferably, the two positioning holes are arranged along the width direction of the positioning plate 1 ( Figure 1 The two inner expansions 2 are symmetrically arranged along the midline on the front-to-back direction of the axis. The two inner expansions 2 correspond to and are connected to the two positioning through holes one by one. The two inner expansions 2 are fixed on the top surface of the positioning plate 1 by screws or bolts. The middle part of each inner expansion 2 has a through hole that passes through in the vertical direction, and the top inner wall of the through hole is an inverted frustum structure. The pressure plate 3 is movably arranged below the positioning plate 1. The pressure plate 3 has two vertically arranged connecting through holes, each of which is connected to the adjacent positioning through holes and is coaxially arranged; two screw rods 4 are respectively inserted into the mutually connected positioning through holes and connecting through holes, and a pressure column 5 is fixed to the upper end of each screw rod 4. The top outer wall of the pressure column 5 is an inverted frustum structure that matches the top inner wall of the inner expansion 2. The lower end of each screw rod 4 is fixedly connected to the pressure plate 3 by a nut 6, so that the screw rod 4 and the pressure plate 3 are connected to form a whole.

[0021] When in use, place the workpiece on the inner expansion 2, and the clamping jaws 7 on all sides drive the pressure plate 3 to move downward, the pressure plate 3 drives the screw 4, and the screw 4 drives the pressure column 5 to move downward. During the downward movement of the pressure column 5, the inner expansion 2 is supported by the inverted frustum structure, so that the inner expansion 2 clamps the workpiece; after the processing is completed, the four-axis clamping jaws 7 release the pressure plate 3, the pressure plate 3 moves up, the pressure plate 3 drives the screw 4, and the screw 4 drives the pressure column 5 to move upward to reset, so that the inner expansion is reset and the workpiece is released, and finally the workpiece can be taken out.

[0022] The four-axis internal expansion clamping device of the utility model has a one-out-two structure, which can clamp two products at the same time, thereby improving production efficiency; the overall structure of the device is simple, the production cost is low, and it can be used for both general and special purposes; the clamping and relaxation of the internal expansion can be controlled by driving the four-axis clamping jaws, and the operation is simple and safe, and no professional operator is required.

[0023] In another embodiment, a pressure block 8 is fixed on the inner wall of the four-axis clamp 7, and the bottom surface of the pressure block 8 is a first inclined surface inclined inward and upward, and the top surface of the pressure plate 3 is provided with a second inclined surface inclined outward and downward on both sides to cooperate with the first inclined surface.

[0024] In the above embodiment, the downward movement of the pressing plate 3 is controlled by driving the four-axis clamp 7 by providing a first inclined surface and a second inclined surface that cooperate with each other on the bottom surface of the pressing block 8 and the top surface of the pressing plate 3. Specifically, the four-axis clamp 7 is controlled to drive the left and right pressing blocks 8 to move inward, and the first inclined surface on the pressing block 8 presses the pressing plate 3 downward, causing the pressing plate 3 to move downward.

[0025] In another embodiment, at least two vertically arranged upright plates 9 are provided below the pressure plate 3, and a vertically arranged guide groove is provided on the top of the upright plate 9. An elastic member 10 is embedded in the guide groove, and the top of the elastic member 10 is connected to the bottom surface of the pressure plate 3.

[0026] In the above embodiment, the elastic member 10 can provide an upward restoring force for the pressure plate 3. Specifically, during the downward movement of the pressure plate 3, the elastic member 10 is compressed, accumulating energy. After the four-axis clamp 7 releases the pressure plate 3, the elastic member 10 extends, driving the pressure plate 3 to move upward.

[0027] In another embodiment, a guide through hole cooperating with the guide groove is provided on the pressure plate 3 , a guide rod 11 is inserted into the guide through hole, and the upper end of the guide rod 11 is fixedly connected to the positioning plate 1 .

[0028] In the above embodiment, the guide rod 11 can guide the movement of the pressing plate 3 so that the pressing plate 3 can only move up and down along the guide rod 11 .

[0029] In another embodiment, the elastic member 10 is a spring.

[0030] In another embodiment, a horizontally arranged bottom plate 12 is fixedly provided below the vertical plate 9 .

[0031] In the above embodiment, the bottom plate 12 is used to support the vertical plate 9 and is connected to the vertical plate 9 to form a whole. In addition, the bottom plate 12 is also fixed to the support base of the four-axis clamp 7 by screws or bolts.

[0032] Principle: The four-axis internal expansion clamping device uses a control panel to control the four-axis clamping jaws 7 to control the clamping and loosening of the internal expansion 2. When the workpiece is placed on the internal expansion 2, the four-axis clamping jaws 7 are controlled to drive the left and right pressure blocks 8 to move inward. The first inclined surface of the bottom surface of the pressure block 8 presses the pressure plate 3 downward. The pressure plate 3 pulls down the pressure column 5 through the screw 4. The pressure column 5 pushes the internal expansion 2 downward, so that the internal expansion 2 clamps the workpiece; after processing is completed, the four-axis clamping jaws 7 drive the left and right pressure blocks 8 to move outward. The pressure block 8 releases the pressure plate 3. Under the action of the spring, the pressure plate 3 moves upward, and the pressure column 5 also moves upward at the same time. The internal expansion 2 is reset, and the workpiece is released and can be removed.

[0033] The number of devices and processing scales described here are used to simplify the description of the present invention. Applications, modifications and variations of the four-axis internal expansion clamping device of the present invention are obvious to those skilled in the art.

[0034] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with this field, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. Four-axis internal expansion clamping device, characterized in that: include: A positioning plate having two vertically arranged positioning through holes; Two inner expansions, which correspond to and are connected to the two positioning through holes one by one, and the two inner expansions are fixed on the top surface of the positioning plate; A pressing plate, which is movably arranged below the positioning plate, and is provided with a connecting through hole that matches the positioning through hole; Two screw rods are inserted into the positioning through hole and the connecting through hole, and the upper end of each screw rod is fixed with a pressure column that cooperates with the inner expansion, and the lower end is fixedly connected to the pressure plate through a nut; wherein, The pressing plate is driven by the four-axis clamp and is transmitted through the pressing plate, screw and pressing column to tighten or loosen the internal expansion.

2. The four-axis internal expansion clamping device according to claim 1, characterized in that: A pressure block is fixed on the inner side wall of the four-axis clamp, the bottom surface of the pressure block is a first inclined surface inclined inward and upward, and second inclined surfaces inclined outward and downward and cooperating with the first inclined surface are provided on both sides of the top surface of the pressure plate.

3. The four-axis internal expansion clamping device according to claim 1, characterized in that: At least two vertically arranged upright plates are provided below the pressing plate, and vertically arranged guide grooves are provided on the tops of the upright plates. Elastic members are embedded in the guide grooves, and the tops of the elastic members are connected to the bottom surface of the pressing plate.

4. The four-axis internal expansion clamping device according to claim 3, characterized in that: The pressing plate is provided with a guide through hole matched with the guide groove, a guide rod is inserted into the guide through hole, and the upper end of the guide rod is fixedly connected to the positioning plate.

5. The four-axis internal expansion clamping device according to claim 3, characterized in that: The elastic member is a spring.

6. The four-axis internal expansion clamping device according to claim 3, characterized in that: A horizontally arranged bottom plate is fixedly provided below the vertical plate.

7. The four-axis internal expansion clamping device according to claim 1, characterized in that: The middle portion of the inner expansion has a through hole that penetrates in the vertical direction, and the top inner wall of the through hole is an inverted frustum structure, and the top outer wall of the pressure column is an inverted frustum structure that matches the top inner wall of the inner expansion.

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