Four-axis clamp for machining box products

Abstract

The utility model discloses a four-axis clamp for processing box products, which comprises a bottom plate and a pressing plate, and one end of the bottom plate is mounted on the outer side surface of a turntable base of a CNC (computerized numerical control) machine table; a pressing cylinder is mounted on the bottom surface of the bottom plate, and the pressing plate is connected with the pressing cylinder; limiting blocks are installed on a bottom plate, a workpiece internally provided with an inner plug block is placed between the limiting blocks on the bottom plate, then a pressing plate is matched with the bottom plate to press the workpiece, and the two ends of the workpiece are exposed; a receding groove is formed in the position, aligned with the to-be-machined part of the workpiece, of the bottom plate, and a receding hole and / or a receding groove are / is formed in the position, aligned with the to-be-machined part of the workpiece, of the pressing plate. In this way, multi-face machining can be achieved through one-time clamping, the stability of product quality is guaranteed, three injuries are reduced, the machining precision and the qualified rate of products are improved, the clamping frequency can be reduced, meanwhile, the device is simple in structure and easy to operate, an operator can conduct rapid clamping, and the utilization rate of a CNC machine table is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial auxiliary production devices, and in particular to a fixture mainly used for clamping small box products for processing, such as AC21 audio boxes and the like. Background Art

[0002] Smaller box products are used in many fields, such as the AC21 audio box, which belongs to the electronic appearance products of science and education. The requirements for such products are high, and the appearance cannot have three kinds of damage: scratches, crushing and bumps. Since such products (workpieces) have multiple surfaces to be processed, the traditional processing method is generally to loosen the workpiece after processing one surface, change another surface for clamping, align the processing tool and continue processing, and proceed in sequence until all processing is completed. The disadvantage is that there are many processes and multiple clamping is required. During the processing, the three kinds of damage are prone to occur due to frequent clamping, resulting in a low yield rate, troublesome clamping, and low processing efficiency. Although some manufacturers have designed some rotatable processing jigs, the structure of such processing jigs is relatively complex, the clamping operation is not convenient, and it is not easy to ensure that the product remains unchanged during clamping and processing. Utility Model Content

[0003] In view of the shortcomings of the prior art, the utility model provides a four-axis fixture for processing box products, which has a simple structure, is easy to operate, has high clamping and processing efficiency, and can improve the processing effect. The fixture is mainly used for processing smaller box workpieces such as AC21 audio boxes.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions: a four-axis fixture for processing box products, which is installed on a turntable base, and the turntable base is installed on a CNC machine table to realize rotation around the central axis of the turntable base, and is characterized in that: it includes a base plate and a pressure plate, and the base plate is installed with one end thereof on the outer side surface of the turntable base to form a structure that can rotate with the turntable base; a downward pressure cylinder is installed on the bottom surface of the base plate, and the pressure plate is connected with the downward pressure cylinder to form a structure that can move relative to the base plate; a limiting block is installed on the base plate, and a workpiece placement space is separated by the limiting block. After the workpiece with an inner plug block inside is placed in the workpiece placement space on the base plate, the pressure plate cooperates with the base plate to press and expose the two ends of the workpiece; an avoidance groove is arranged on the base plate at the position to be processed of the workpiece, and the position to be processed on the bottom surface of the workpiece is exposed through the avoidance groove; an avoidance hole and / or avoidance groove is arranged on the pressure plate at the position to be processed of the workpiece, and the position to be processed on the surface of the workpiece is exposed through the avoidance hole and / or avoidance groove of the pressure plate.

[0005] Furthermore, a positioning mechanism is installed on the base plate at a position outside the limit block, and the positioning mechanism includes a positioning cylinder, a positioning rod and a positioning block. The positioning rod is connected to the positioning cylinder, and the positioning block is installed at the front end of the positioning rod. After the workpiece is installed on the base plate, the positioning cylinder is driven to block one end of the workpiece to form a positioning structure for the workpiece.

[0006] Furthermore, the downward pressure cylinder and the limit block each include two left and right parts, and each of the two downward pressure cylinders is connected with a clamping screw, and the two clamping screws are connected to the pressure plate through the bottom plate at the outer sides of the two limit blocks.

[0007] Furthermore, mounting grooves with one side opening are respectively arranged on the pressing plate at the positions aligned with the two clamping screws, and the clamping screws are embedded in the mounting grooves and assembled and fixed to the pressing plate.

[0008] Furthermore, a reinforcing plate is provided on the bottom surface of the bottom plate, and the top surface and end surface of the reinforcing plate are respectively connected and fixed to the bottom plate and the turntable base to form a reinforcing support structure for the bottom plate.

[0009] Furthermore, two baffles are arranged on the bottom surface of the bottom plate, and the front and rear sides of the downward pressure cylinder are blocked by the two baffles.

[0010] Furthermore, the positioning rod is vertically installed at the front end of the cylinder rod of the positioning cylinder so that the positioning rod extends laterally to a position close to the front end of the workpiece, and the positioning block is installed on the inner side of the front end of the positioning rod to be opposite to the front end of the workpiece.

[0011] The utility model controls the pressure plate to move toward the bottom plate to press the workpiece by the pressure cylinder below. The entire device is installed on the CND three-axis machine through a turntable base so that it can rotate 360 ​​degrees along the horizontal axis. In this way, multi-faceted processing can be achieved through one clamping, ensuring the stability of product quality, reducing three injuries, improving the processing accuracy and qualified rate of the product, and only one processing is required, saving costs. Thereby, the number of clamping times can be reduced, and the bottom plate and the pressure plate basically press the workpiece as a whole, which can better prevent the workpiece from deformation. At the same time, the device structure is relatively simple and easy to operate. The operator can clamp quickly, which improves the utilization rate of the CNC machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 It is a schematic diagram of the overall structure of the utility model from another angle;

[0014] Figure 3 This is a schematic diagram of the overall structure of the utility model from a third angle;

[0015] Figure 4 It is a schematic diagram of the exploded structure of the utility model.

[0016] In the figure, 1 is a base plate, 11 is an avoidance groove, 12 is a reinforcing plate, 2 is a pressure plate, 21 is an avoidance hole, 22 is a mounting groove, 31 is a positioning cylinder, 32 is a positioning rod, 33 is a positioning block, 4 is a downward pressure cylinder, 41 is a clamping screw, 5 is an inner plug block, 6 is a limit block, 7 is a baffle, 8 is a turntable base, and 9 is a workpiece. DETAILED DESCRIPTION

[0017] In this embodiment, refer to Figure 1-Figure 4 The four-axis fixture for processing box products is installed on a turntable base 8, and the turntable base 8 is installed on the CNC three-axis machine platform to realize rotation around the central axis of the turntable base 8; the four-axis fixture includes a bottom plate 1 and a pressure plate 2, and the bottom plate 1 is installed with one end thereof on the outer side of the turntable base 8 to form a structure that can rotate with the turntable base 8; a downward pressure cylinder 4 is installed on the bottom surface of the bottom plate 1, and the pressure plate 2 is connected to the downward pressure cylinder 4 to form a structure that can move relative to the bottom plate 1; a limit block 6 is installed on the bottom plate 1, and a workpiece placement space is formed by the limit block 6, and a workpiece 9 with an inner plug block 5 installed inside is placed After the workpiece is placed in the space on the base plate 1, the pressing plate 2 cooperates with the base plate 1 to press and expose the two ends of the workpiece 9 so that the two ends can be processed; a avoidance groove 11 is provided on the base plate 1 at the position to be processed of the workpiece 9, and the position to be processed on the bottom surface of the workpiece 9 is exposed through the avoidance groove 11; an avoidance hole 21 (or an avoidance groove) is provided on the pressing plate 2 at the position to be processed of the workpiece 9, and the position to be processed on the surface of the workpiece is exposed through the avoidance hole 21 of the pressing plate 2, and the other parts of the upper and lower surfaces of the workpiece 9 are basically pressed by the pressing plate 2 and the base plate 1, thereby better preventing the workpiece 9 from being deformed when pressed.

[0018] A positioning mechanism is installed on the bottom plate 1 at the position outside the limit block 5, and the positioning mechanism includes a positioning cylinder 31, a positioning rod 32 and a positioning block 33. The positioning rod 32 is connected to the positioning cylinder 31, and the positioning block 33 is installed at the front end of the positioning rod 32. After the workpiece 9 is installed on the bottom plate 1, the positioning block 33 is driven by the positioning cylinder 31 to block one end of the workpiece 9 to form a positioning structure for the workpiece 9. In this way, the workpiece 9 can be positioned with higher precision, and the positioning operation is very convenient.

[0019] The pressing cylinder 4 and the limiting block 6 each include two left and right parts. The two pressing cylinders 4 are each connected with a clamping screw 41 . The two clamping screws 41 pass through the bottom plate 1 and are connected to the pressing plate 2 at the outer sides of the two limiting blocks 6 .

[0020] The pressing plate 2 is provided with mounting grooves 22 with one side open at the positions of the two clamping screws 41, and the clamping screws 41 are inserted into the mounting grooves 22 and assembled and fixed to the pressing plate 2. This structure makes the installation and removal of the pressing plate 2 very convenient, and it can be pulled forward without screwing out the clamping screws 41.

[0021] A reinforcing plate 12 is further provided on the bottom surface of the bottom plate 1 , and the top surface and end surface of the reinforcing plate 12 are respectively connected and fixed to the bottom plate 1 and the turntable base 8 to form a reinforcing support structure for the bottom plate 1 .

[0022] Two baffles 7 are arranged on the bottom surface of the bottom plate 1 , and the front and rear sides of the downward pressure cylinder 4 are blocked by the two baffles 7 .

[0023] The positioning rod 32 is vertically installed at the front end of the cylinder rod of the positioning cylinder 31 so that the positioning rod 32 extends laterally to a position close to the front end of the workpiece 9, and the positioning block 33 is installed on the inner side of the front end of the positioning rod 32 to be opposite to the front end of the workpiece 9.

[0024] After the workpiece 9 is mounted on the bottom plate 1, the positioning cylinder 31 is started to move the workpiece 9 and the inner plug 5 to the set position to complete the positioning. Then the downward pressing cylinder 4 is started, and the pressing screw 41 drives the pressing plate 2 to move downward to cooperate with the bottom plate 1 to press the workpiece. Taking the processing of the AC21 audio box as an example, the front end of the box is processed first; then the entire device is rotated by the CNC machine to rotate the box to align with the processing tool, and the tool processes a through hole on the upper surface of the box through the avoidance hole 21 on the pressing plate 2; the entire device is rotated again to align the rear end of the box with the tool for processing; finally, the entire device is rotated again to align the bottom surface of the box with the tool, and the tool processes the hole on the bottom surface of the box through the avoidance groove 11 on the bottom plate 1, thus forming a four-axis rotation process. After the processing is completed, each cylinder retracts, and the workpiece 9 can be taken out after the clamping is released.

[0025] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention and should not limit the scope of implementation of the present invention. That is, all equivalent changes and modifications made within the scope of this application should still fall within the scope of the present invention.

Claims

1. A four-axis fixture for processing box products, mounted on a turntable base, the turntable base is mounted on a CNC machine table to be able to rotate around the central axis of the turntable base, characterized in that: It includes a base plate and a pressure plate, one end of which is installed on the outer side of the turntable base to form a structure that can rotate with the turntable base; a downward pressure cylinder is installed on the bottom surface of the base plate, and the pressure plate is connected to the downward pressure cylinder to form a structure that can move relative to the base plate; a limiting block is installed on the base plate, and a workpiece placement space is separated by the limiting block. After the workpiece with an inner plug block inside is placed in the workpiece placement space on the base plate, the pressure plate cooperates with the base plate to press and expose the two ends of the workpiece; an avoidance groove is arranged on the base plate to align with the part to be processed of the workpiece, and the part to be processed on the bottom surface of the workpiece is exposed through the avoidance groove; an avoidance hole and / or avoidance groove is arranged on the pressure plate to align with the part to be processed of the workpiece, and the part to be processed on the surface of the workpiece is exposed through the avoidance hole and / or avoidance groove of the pressure plate.

2. The four-axis fixture for processing box products according to claim 1 is characterized in that: A positioning mechanism is installed on the base plate at a position outside the limit block. The positioning mechanism includes a positioning cylinder, a positioning rod and a positioning block. The positioning rod is connected to the positioning cylinder, and the positioning block is installed at the front end of the positioning rod. After the workpiece is installed on the base plate, the positioning cylinder is driven to block one end of the workpiece to form a positioning structure for the workpiece.

3. The four-axis fixture for processing box products according to claim 1 is characterized in that: The downward pressure cylinder and the limit block both include two left and right parts. The two downward pressure cylinders are each connected with a clamping screw. The two clamping screws pass through the bottom plate and are connected with the pressure plate at the outer sides of the two limit blocks.

4. The four-axis fixture for processing box products according to claim 3 is characterized in that: Mounting grooves with one side opening are respectively arranged on the pressing plate at the positions aligned with the two clamping screws, and the clamping screws are embedded in the mounting grooves and assembled and fixed with the pressing plate.

5. The four-axis fixture for processing box products according to claim 2, characterized in that: A reinforcing plate is also arranged on the bottom surface of the bottom plate, and the top surface and end surface of the reinforcing plate are respectively connected and fixed to the bottom plate and the turntable base to form a reinforcing support structure for the bottom plate.

6. The four-axis fixture for processing box products according to claim 1, characterized in that: Two baffles are arranged on the bottom surface of the bottom plate, and the front and rear sides of the downward pressure cylinder are blocked by the two baffles.

7. The four-axis fixture for processing box products according to claim 2, characterized in that: The positioning rod is vertically installed at the front end of the cylinder rod of the positioning cylinder so that the positioning rod extends horizontally to a position close to the front end of the workpiece, and the positioning block is installed on the inner side of the front end of the positioning rod to face the front end of the workpiece.

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