Four-way centering clamp

Abstract

The utility model belongs to the technical field of tool clamps, and discloses a four-direction centering clamp which comprises a base, a centering mechanism is arranged in the base and comprises a four-direction centering assembly and a centering power assembly, a clamping mechanism is arranged on the outer side of the four-direction centering assembly, and the centering power assembly is connected with the clamping mechanism. Inductor assemblies are arranged on the front portion and the rear portion of the top of the base correspondingly, and a vacuum suction assembly is arranged on the top of the centering mechanism. The clamping mechanism is provided with the sliding shafts and the driving block, the cylinder body and the piston shaft are matched to drive the driving block to move downwards, the inclined sliding surfaces extrude the inclined sliding grooves in the sliding shafts to drive the four sliding shafts to move outwards, and then the four sliding shafts drive the clamping mechanism to move to loosen a workpiece; a workpiece at the top of the vacuum suction assembly is clamped, so that the functions of simultaneous clamping and opening of the four-direction clamping jaws are achieved, and due to the fact that the four clamping jaws move simultaneously, the four-direction centering precision is high, and the repeated positioning precision is high.

Description

Technical Field

[0001] This utility model belongs to the field of tooling and fixture technology, specifically a four-way centering fixture. Background Technology

[0002] A fixture is a type of process equipment used to clamp workpieces. In the machining process, the precise clamping and positioning of the workpiece is one of the key factors to ensure machining accuracy. It is used to accurately determine the position of the workpiece and reliably clamp it.

[0003] Existing fixtures often only achieve unidirectional or bidirectional positioning, which is insufficient to meet the machining requirements of some complex-shaped workpieces or those with high centering accuracy. When machining some circular or polygonal parts, the fixture needs to be able to center the workpiece in multiple directions simultaneously to ensure that the center of the workpiece is precisely aligned with the spindle center of the machining equipment, thereby improving machining accuracy and quality. However, existing fixtures are inadequate in achieving multi-directional centering, are complex to operate, and have unstable centering accuracy, which affects machining efficiency and product quality. Therefore, they need to be improved. Utility Model Content

[0004] To address the problems mentioned in the background art, this utility model provides a four-way centering clamp.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a four-way centering clamp, including a base, a centering mechanism is provided inside the base, the centering mechanism includes a four-way centering component and a centering power component, a clamping mechanism is provided on the outside of the four-way centering component, a sensor component is provided at both the front and rear of the top of the base, and a vacuum suction component is provided on the top of the centering mechanism.

[0006] The four-way centering assembly includes a centering seat, the bottom of which is connected to the top of the base. Each cavity of the centering seat is provided with a sliding shaft, and four sliding shafts are respectively located on the four sides of the centering seat. The outer sides of each of the four sliding shafts extend to the outside of the centering seat and are connected to a clamping mechanism. The cavity of the centering seat is provided with a driving block, which is cross-shaped and has inclined sliding surfaces on all four sides. The inner sides of each of the four sliding shafts are provided with inclined sliding grooves, the interior of which is adapted to the inclined surface on the outer side of the driving block. The bottom of the driving block is connected to the centering power assembly.

[0007] Preferably, the base has threaded holes inside, and the threaded holes are located around the top of the base.

[0008] Preferably, the centering power assembly includes a cylinder block, inside which a piston shaft is disposed, the top of which extends to the outside of the cylinder block and is connected to the bottom of the drive block.

[0009] Preferably, the clamping mechanism includes a jaw, the inner side of which is connected to the outer side of the sliding shaft, a clamping block is provided on the top of the jaw, a fine-tuning structure is provided on the outer side of the jaw, and the inner side of the fine-tuning structure extends into the clamping block.

[0010] Preferably, the sensor assembly includes a fixed bracket, the bottom of which is connected to the top of the base, a sensing line is provided on the outside of the fixed bracket, a sealing structure is provided on the top of the fixed bracket, and a magnetic card is provided on the outside of the gripper, located outside the sensing line.

[0011] Preferably, the vacuum suction assembly is connected to the centering seat by bolts, and the outer surface of the vacuum suction assembly is provided with multiple air holes.

[0012] Preferably, the centering seat has a sliding shaft hole inside, the sliding shaft hole is adapted to the size of the sliding shaft, and the angle of the inclined sliding surface is designed to be degrees.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] This utility model is equipped with a sliding shaft and a drive block. The cylinder and piston shaft work together to drive the drive block to move downward. The inclined sliding surface presses against the inclined sliding groove on the sliding shaft, causing the four sliding shafts to move outward. In turn, the four sliding shafts drive the clamping mechanism to move to release the workpiece. At the same time, when the drive block is reset, it clamps the workpiece at the top of the vacuum suction assembly, thereby realizing the function of clamping and opening the four-way grippers at the same time. Since the four grippers move at the same time, the four-way centering accuracy is high and the repeatability is high.

[0015] This utility model is equipped with an induction line and a piston shaft. By changing the induction line from a conventional induction cylinder piston to a gripper at the end of the induction line, the piston sliding surface is increased, which improves the convenience of induction line debugging and maintenance. At the same time, it also improves the impact resistance of the piston shaft and avoids jamming. Thus, by placing the sensor assembly externally, its distance can be adjusted in the up and down and left and right directions, and it is convenient for debugging and installation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a front sectional view of the present invention.

[0018] Figure 3 This is a schematic diagram of the sensor assembly of this utility model;

[0019] Figure 4 This is a cross-sectional view of the sliding shaft of this utility model;

[0020] Figure 5This is a schematic diagram of the top structure of this utility model.

[0021] In the diagram: 1. Base; 2. Centering mechanism; 201. Centering seat; 202. Drive block; 203. Sliding shaft; 204. Cylinder; 205. Piston shaft; 3. Clamping mechanism; 301. Gripper; 302. Clamping block; 303. Fine-tuning structure; 4. Sensor assembly; 401. Sensing wire; 402. Fixing bracket; 403. Sealing structure; 404. Magnetic card; 5. Vacuum suction assembly. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example 1

[0024] like Figures 1 to 5 As shown, this is the first embodiment of the utility model, which provides a four-way centering clamp, including a base 1, a centering mechanism 2 is provided inside the base 1, the centering mechanism 2 includes a four-way centering component and a centering power component, a clamping mechanism 3 is provided on the outside of the four-way centering component, a sensor component 4 is provided at the front and rear of the top of the base 1, and a vacuum suction component 5 is provided on the top of the centering mechanism 2.

[0025] The four-way centering assembly includes a centering seat 201, the bottom of which is connected to the top of the base 1. Each cavity of the centering seat 201 is provided with a sliding shaft 203. There are four sliding shafts 203, which are respectively located on the four sides of the centering seat 201. The outer sides of the four sliding shafts 203 extend to the outside of the centering seat 201 and are connected to the clamping mechanism 3. The cavity of the centering seat 201 is provided with a driving block 202. The driving block 202 is cross-shaped and has inclined sliding surfaces on all four sides. The inner sides of the four sliding shafts 203 are provided with inclined sliding grooves, which are adapted to the inclined surfaces on the outer sides of the driving block 202. The bottom of the driving block 202 is connected to the centering power assembly.

[0026] When the centering power assembly is activated, the drive block 202 moves downward. Because the inclined surface on the outer side of the cross-shaped drive block 202 matches the inclined slide groove, the four sliding shafts 203 move outward as the drive block 202 moves downward, and the clamping mechanism 3 is in the open state. At this time, the workpiece is placed on top of the vacuum suction assembly 5, and the centering power assembly is reset, causing the four sliding shafts 203 and the clamping mechanism 3 to clamp the workpiece simultaneously, thereby realizing the function of simultaneous clamping and opening of the four-way grippers 301. Because the four grippers 301 move simultaneously, the four-way centering accuracy is high and the repeatability is high.

[0027] Example 2

[0028] like Figure 1 and Figure 2 As shown, this embodiment includes the features of embodiment 1. The distinguishing technical feature is that a threaded hole is provided inside the base 1, and the threaded hole is located around the top of the base 1.

[0029] The base 1 is the basic support part of the fixture. It is made of high-strength material and has good stability and rigidity. The threaded hole on the base 1 is used to install the stepped surface, making it easy to connect with other components.

[0030] The centering power assembly includes a cylinder 204, inside which a piston shaft 205 is provided. The top of the piston shaft 205 extends to the outside of the cylinder 204 and is connected to the bottom of the drive block 202.

[0031] The cylinder 204 and piston shaft 205 work together to drive the drive block 202 to move downwards. The inclined surfaces on the four sides of the drive block 202 squeeze and drive the four sliding shafts 203 to move outwards, thereby completing the four-way centering of the workpiece.

[0032] The clamping mechanism 3 includes a jaw 301, the inner side of which is connected to the outer side of the sliding shaft 203. A clamping block 302 is provided on the top of the jaw 301, and a fine-tuning structure 303 is provided on the outer side of the jaw 301. The inner side of the fine-tuning structure 303 extends into the inside of the clamping block 302.

[0033] By rotating the fine-tuning structure 303, the clamping block 302 is moved inward, thereby squeezing the workpiece through the clamping block 302 and making a fine adjustment to the position of the clamping block 302, thus making the workpiece more stable.

[0034] Example 3

[0035] like Figure 3 and Figure 5As shown, this embodiment includes the features of embodiment 1. The distinguishing technical feature is that the sensor assembly 4 includes a fixed bracket 402, the bottom of the fixed bracket 402 is connected to the top of the base 1, a sensing line 401 is provided on the outside of the fixed bracket 402, a sealing structure 403 is provided on the top of the fixed bracket 402, and a magnetic card 404 located outside the sensing line 401 is provided on the outside of the gripper 301.

[0036] By moving the sensing line 401 on the centering power assembly outward, the piston shaft 205 does not need to be equipped with a magnet, which can increase the sliding surface size of the piston shaft 205, thereby ensuring that the operation is free from jamming due to force. The sensor assembly 4 is provided with two sets, one set on the front and one set on the back. During use, it is used to sense the clamping and loosening states of the gripper 301 to facilitate processing in an automated environment.

[0037] The sealing structure 403 on the fixed bracket 402 is used to prevent the splashing of cutting fluid during machining from affecting the sensing performance and causing machining abnormalities. At the same time, the fixed bracket 402 is made of sheet metal material through bending and cutting, which has a simple structure and low processing cost.

[0038] The vacuum suction assembly 5 is connected to the centering seat 201 by bolts, and the outer surface of the vacuum suction assembly 5 is provided with multiple air holes;

[0039] By setting multiple air holes on the vacuum suction component 5, the adsorption area is increased when clamping and fixing the workpiece, thereby improving the adsorption force of the processed product. In addition, the vacuum suction component 5 is designed to be relatively high, so that when the product has been processed for a long time and the flatness is not good, it can be directly machined by CNC to improve the processing accuracy of the product.

[0040] The centering seat 201 has a sliding shaft hole inside, which is adapted to the size of the sliding shaft 203, and the angle of the inclined sliding surface is designed to be 50 degrees.

[0041] By designing four sliding shaft holes in the same plane on the centering seat 201, these four holes are high-precision holes, with each pair of shaft holes perpendicular to each other, and high-precision inclined sliding surfaces are designed in the four directions of the drive block 202, the problem of easy jamming during four-way drive is avoided, and the clamping and use is smoother.

[0042] Working principle and usage process of this utility model:

[0043] First, the centering power assembly is activated, driving the piston shaft 205 and drive block 202 to move upward. Through the cooperation of the inclined sliding surface and the inclined sliding groove, the four sliding shafts 203 are driven to move outward, driving the clamping mechanism 3 to move outward, thus opening the clamping mechanism 3. Then, the workpiece is placed on top of the vacuum suction assembly 5. Then, the drive block 202 is reset, driving the clamping mechanism 3 on the four sliding shafts 203 to clamp the workpiece in four directions, centering the workpiece. At the same time, the fine adjustment structure 303 is rotated to fine adjust the position of the workpiece. After the product is centered, the gripper 301 is released, the vacuum suction assembly 5 is activated, and the product is clamped for processing. This realizes the function of clamping and opening the four-way gripper 301 at the same time. Since the four grippers 301 move at the same time, its four-way centering accuracy is high and its repeatability is high. When processing some workpieces, by removing the vacuum suction assembly 5 and using the grippers 301 for clamping and processing, the fixture has a wide range of applications and is convenient for operators to use.

[0044] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0045] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A four-way centering fixture comprising a base (1), characterized in that: The base (1) is internally provided with a centering mechanism (2), the centering mechanism (2) comprises a four-way centering assembly and a centering power assembly, the four-way centering assembly is externally provided with a clamping mechanism (3), the front and rear of the top of the base (1) are provided with an inductor assembly (4), and the top of the centering mechanism (2) is provided with a vacuum suction assembly (5); The four-way centering assembly comprises a centering seat (201), the bottom of the centering seat (201) is connected with the top of the base (1), sliding shafts (203) are arranged in the inner cavities of the centering seat (201), four sliding shafts (203) are arranged at four edges of the centering seat (201), the four sliding shafts (203) are externally connected with the clamping mechanism (3), a driving block (202) is arranged in the inner cavity of the centering seat (201), the driving block (202) is in the shape of a cross, inclined sliding surfaces are arranged at four edges of the driving block (202), inclined sliding grooves are formed in the inner sides of the four sliding shafts (203), the inclined sliding grooves are matched with the inclined surfaces on the outer side of the driving block (202), and the bottom of the driving block (202) is connected with the centering power assembly.

2. A four-way centering fixture according to claim 1, characterized in that: The base (1) is internally provided with a threaded hole, and the threaded hole is located at the top of the base (1).

3. A four-way centering fixture as claimed in claim 1, wherein: The centering power assembly comprises a cylinder body (204), a piston shaft (205) is arranged in the cylinder body (204), and the top of the piston shaft (205) extends to the outside of the cylinder body (204) and is connected with the bottom of the driving block (202).

4. A four-way centering fixture as claimed in claim 1, wherein: The clamping mechanism (3) comprises a clamping jaw (301), the inner side of the clamping jaw (301) is connected with the outer side of the sliding shaft (203), a clamping block (302) is arranged at the top of the clamping jaw (301), a fine adjustment structure (303) is arranged on the outer side of the clamping jaw (301), and the fine adjustment structure (303) extends to the inside of the clamping block (302).

5. A four-way centering fixture according to claim 4, wherein: The inductor assembly (4) comprises a fixed support (402), the bottom of the fixed support (402) is connected with the top of the base (1), an inductive line (401) is arranged on the outer side of the fixed support (402), a sealing structure (403) is arranged at the top of the fixed support (402), and a magnetic card (404) is arranged on the outer side of the inductive line (401).

6. A four-way centering fixture as claimed in claim 1, wherein: The vacuum suction assembly (5) is connected with the centering seat (201) through bolts, and a plurality of air holes are arranged on the outer surface of the vacuum suction assembly (5).

7. A four-way centering fixture as claimed in claim 1, wherein: The centering seat (201) is internally provided with a sliding shaft hole, the sliding shaft hole is matched with the sliding shaft (203) in size, and the angle of the inclined sliding surface is 50 degrees.

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