Face grinding machine tool clamp

Abstract

The surface grinding machine tool clamp comprises a hollow bottom table, a main shaft rotationally installed at the center position of the top of the hollow bottom table and a square workpiece table fixedly installed at the upper end of the main shaft, the hollow bottom table is of an internal cavity structure, and a gear motor is installed at the bottom of the hollow bottom table; a driving shaft of the speed reduction motor is fixedly connected with the lower end of the main shaft, the front outer wall and the rear outer wall of the square workpiece table are each provided with two symmetrical pneumatic pressing mechanisms, and a control panel electrically connected with the pneumatic pressing mechanisms and the speed reduction motor is installed on the outer wall of one side of the hollow bottom table. According to the invention, the hollow bottom table, the speed reducing motor, the square workpiece table, the pneumatic pressing mechanisms, the control panel and other structures which are matched with one another are arranged, and the speed reducing motor drives the square workpiece table and the pneumatic pressing mechanisms which are symmetrical pairwise to carry out 180-degree transposition, so that one group of stations are always in a processing state.

Description

Technical Field

[0001] The present invention relates to the technical field of surface grinders, and specifically to a fixture for a surface grinder. Background Art

[0002] The plate fixture of a surface grinder is a key device to ensure the stable positioning and clamping of workpieces during grinding. Its functions include precise positioning, preventing displacement, improving efficiency, protecting the workpiece surface, and expanding complex machining functions. The structure of the fixture usually consists of a fixture body, positioning elements (such as baffles, V-blocks, positioning pins), clamping mechanisms (such as screw clamping, eccentric wheels, hydraulic / pneumatic devices), and auxiliary elements (such as shims, elastic gaskets). Among them, magnetic fixtures and vacuum fixtures are suitable for workpieces of different materials. The usage process mainly includes preparatory work (cleaning and inspection), workpiece positioning (fitting the reference surface or using a dial indicator for calibration), clamping operation (tightening step by step or activating magnetism / vacuum), machining verification (first-piece inspection), and workpiece unloading and maintenance (cleaning and lubrication). Attention should be paid to clamping force control during operation to avoid deformation, manage the influence of thermal deformation, and design customized fixtures for special workpieces. However, at present, there is only one clamping and machining station in the fixture of the grinder. When changing workpieces, the grinder must stop running. After completing unloading, cleaning, clamping, and repositioning, it can continue to process the next workpiece. When batch processing small parts, operators need to frequently load and unload workpieces, resulting in reduced equipment utilization and overall production efficiency. Moreover, for high-precision grinding, positioning and calibration are required after each reinstallation, further prolonging the non-cutting time. Summary of the Invention

[0003] The purpose of the present invention is to provide a fixture for a surface grinder, which is driven by a reduction motor to rotate the square workpiece table and the pneumatic clamping mechanisms symmetrically in pairs by 180 degrees to ensure that there is always a set of workstations in the processing state, so as to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A fixture for a surface grinder, including a hollow bottom table, a main shaft rotatably installed at the center position on the top of the hollow bottom table, and a square workpiece table fixedly installed at the upper end of the main shaft. The hollow bottom table is of an internal cavity structure, and a reduction motor is installed at the bottom of the hollow bottom table. The driving shaft of the reduction motor is fixedly connected to the lower end of the main shaft. Two symmetrical pneumatic clamping mechanisms are installed on the front and rear outer walls of the square workpiece table. A control panel electrically connected to the pneumatic clamping mechanisms and the reduction motor is installed on one outer wall of the hollow bottom table.

[0005] Preferably, a convex part is integrally formed on the upper surface of the square workpiece table, and a pneumatic suction cup is installed at the center position inside the convex part.

[0006] Preferably, the material of the hollow bottom table is aluminum alloy, and rubber pads are bonded at the corner positions of the bottom of the hollow bottom table.

[0007] Preferably, one end of the surface of the main shaft is fixed with a support disc, and the lower surface of the support disc is in contact with the upper surface of the hollow bottom table.

[0008] Preferably, the pneumatic pressing mechanism includes a cylinder installed on one side of the bottom end of the square workpiece table and a right-angle pressing seat installed at the top end of the cylinder piston rod. The height of the top wall of the right-angle pressing seat is higher than the height of the upper surface of the convex part.

[0009] Preferably, the thickness of the convex part is 2 cm to 3 cm.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows: The fixture of this surface grinder is provided with a hollow bottom table, a reduction motor, a square workpiece table, a pneumatic pressing mechanism, and a control panel and other cooperating structures. The reduction motor drives the square workpiece table and the pneumatic pressing mechanisms that are symmetrically arranged in pairs to perform a 180-degree transposition, ensuring that there is always a set of workstations in the processing state. Among them, through the 180-degree transposition design, while a set of workpieces is being processed, the other set of workstations can perform workpiece replacement or adjustment, thus realizing the parallel operation of "processing - loading and unloading", meeting the clamping needs of the double workstations, thereby greatly reducing the non-processing time and improving the equipment utilization rate. Secondly, since the reduction motor adopts servo control, the transposition process is stable and accurate, avoiding vibration or impact caused by sudden start and stop. At the same time, the symmetrically arranged pneumatic pressing mechanisms can immediately lock the workpieces at the new workstations after transposition, ensuring the rigid support during processing. Compared with the single-station fixture, this design can effectively reduce the processing errors caused by workpiece loosening or fixture vibration and improve the processing accuracy. Finally, the combination of the pneumatic pressing mechanisms that are symmetrically arranged in pairs and the square workpiece table makes the fixture structure compact, occupies less space, and the operator can perform loading and unloading at a fixed position without frequent movement, reducing the labor intensity. Moreover, since the transposition angle is fixed at 180 degrees, the operation process is more standardized, reducing the errors of manual adjustment, and is suitable for integrated application in the automated production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is the front view structural schematic diagram of the present invention;

[0012] Figure 2 is the side view structural schematic diagram of the present invention;

[0013] Figure 3 is the three-dimensional sectional structural schematic diagram of the present invention;

[0014] Figure 4 is the three-dimensional structural schematic diagram of the present invention.

[0015] In the figure: 1. Hollow base; 2. Main shaft; 3. Square workpiece table; 4. Protrusion; 5. Pneumatic suction cup; 6. Pneumatic clamping mechanism; 601. Cylinder; 602. Right-angle pressure seat; 7. Reducing motor; 8. Control panel. Specific implementation mode

[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0017] Please refer to Figures 1-4 , an embodiment provided by the present invention: A fixture for a surface grinder includes a hollow base 1, a main shaft 2 rotatably installed at the center position of the top of the hollow base 1, and a square workpiece table 3 fixedly installed at the upper end of the main shaft 2. The hollow base 1 is of an internal cavity structure. A reducing motor 7 is installed at the bottom of the hollow base 1, and the driving shaft of the reducing motor 7 is fixedly connected to the lower end of the main shaft 2. The internal cavity of the hollow base 1 can accommodate components such as the reducing motor 7 and air circuit pipes, making the overall structure more compact and avoiding messy external wiring;

[0018] Two symmetrical pneumatic clamping mechanisms 6 are installed on the front and rear outer walls of the square workpiece table 3, and a control panel 8 electrically connected to the pneumatic clamping mechanism 6 and the reducing motor 7 is installed on one outer wall of the hollow base 1;

[0019] A protrusion 4 is integrally formed on the upper surface of the square workpiece table 3. The thickness of the protrusion 4 is 2 cm to 3 cm. A pneumatic suction cup 5 is installed at the center position inside the protrusion 4. The pneumatic suction cup 5 is used to realize the vacuum adsorption function to further improve the fixing strength of the workpiece on the protrusion 4;

[0020] The material of the hollow base 1 is aluminum alloy. Rubber pads are bonded at the corner positions at the bottom of the hollow base 1. A support disk is fixed at one end of the surface of the main shaft 2, and the lower surface of the support disk is in contact with the upper surface of the hollow base 1. The reducing motor 7 can still maintain high torque at low speeds, is more power-saving than ordinary motors, is suitable for long-term continuous operation, and since the processing and loading / unloading areas are separated in space, the operator does not need to approach the processing area when the machine tool is running, reducing the risk of safety accidents;

[0021] The pneumatic clamping mechanism 6 includes a cylinder 601 installed on one side of the bottom end of the square workpiece table 3 and a right-angle pressure seat 602 installed at the top end of the piston rod of the cylinder 601. The top wall height of the right-angle pressure seat 602 is higher than the upper surface height of the protrusion 4. The cylinder 601 drives the right-angle pressure seat 602 to move downwards, and the middle-positioned right-angle pressure seat 602 presses on the upper surface of the workpiece. The action time of the cylinder 601 is short, and the efficiency is improved compared with manual screw clamping.

[0022] When the embodiment of the present application is in use, first, the hollow base 1 is firmly installed on the grinding machine workbench through bolts to ensure that it is horizontal and without shaking. The reduction motor 7 is started through the control panel 8 to rotate the square workpiece table 3 to the initial position at zero degree. The workpiece is placed stably on the convex part 4 of the square workpiece table 3 to ensure that the workpiece fits well with the tabletop without warping. The pneumatic clamping mechanism 6 is turned on through the control panel 8. The moving end of the pneumatic clamping mechanism 6 moves towards the top of the workpiece to apply a preset pressure. After the clamping is completed, gently push the workpiece manually to confirm that there is no displacement. Observe whether the clamping mechanism is evenly stressed to avoid workpiece deformation caused by local overload. After the workpiece is clamped, the reduction motor 7 is turned on through the control panel 8. The reduction motor 7 rotates the square workpiece table 3 to the target angle, and the grinding machine automatically processes the workpiece. When a group of workpieces are being ground, the next workpiece can be prepared for clamping at another station. After the current station is processed, the reduction motor 7 drives the square workpiece table 3 to rotate 180 degrees, so that the clamped workpiece enters the processing area, and at the same time, the original processing area is changed to the loading and unloading state. The staff removes the processed workpiece and installs a new workpiece, and the above steps are cycled to achieve continuous production.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly defined and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0024] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they can be located in one place, or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement it without creative labor.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or equivalently replace some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fixture for a surface grinder, characterized in that: It includes a hollow base (1), a main shaft (2) rotatably installed at the central position on the top of the hollow base (1), and a square workpiece table (3) fixedly installed at the upper end of the main shaft (2). The hollow base (1) has an internal cavity structure. A reduction motor (7) is installed at the bottom of the hollow base (1), and the drive shaft of the reduction motor (7) is fixedly connected to the lower end of the main shaft (2). Two symmetric pneumatic clamping mechanisms (6) are installed on the front and rear outer walls of the square workpiece table (3). A control panel (8) electrically connected to the pneumatic clamping mechanism (6) and the reduction motor (7) is installed on one outer wall of the hollow base (1).

2. The fixture for surface grinder according to claim 1, wherein: A convex portion (4) is integrally formed on the upper surface of the square workpiece table (3), and a pneumatic suction cup (5) is installed at the central position inside the convex portion (4).

3. A fixture for a surface grinder according to claim 1, wherein: The hollow base (1) is made of aluminum alloy, and rubber pads are bonded at the corner positions of the bottom of the hollow base (1).

4. A fixture for a surface grinder according to claim 1, wherein: A support disc is fixed at one end of the surface of the main shaft (2), and the lower surface of the support disc is in contact with the upper surface of the hollow base (1).

5. The fixture for surface grinder according to claim 2, wherein: The pneumatic clamping mechanism (6) includes a cylinder (601) installed on one side of the bottom end of the square workpiece table (3) and a right-angle pressure seat (602) installed at the top end of the piston rod of the cylinder (601). The top wall height of the right-angle pressure seat (602) is higher than the upper surface height of the convex portion (4).

6. The fixture for surface grinder according to claim 2, wherein: The thickness of the convex portion (4) is 2 cm to 3 cm.

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