Pneumatic clamp test bench

Abstract

The pneumatic clamp test bench comprises a fixing mechanism and a swing mechanism, the fixing mechanism comprises a support, a bearing seat and an inner clamp type pneumatic clamp which are connected through fasteners, and the swing mechanism comprises a force application rod, a torque sensor, a sensor base, a shaft core, a first sleeve and a rotation angle test assembly which are connected through fasteners. The first sleeve is arranged in the inner clamping type pneumatic forceps holder in a sleeved mode, and a bearing is arranged between the shaft core and the bearing seat so as to achieve connection between the swing mechanism and the fixing mechanism. The pneumatic clamp test bench is simple and compact in overall structure, can test the maximum torque of a pneumatic clamp and rotation angles under different torques, and can perform auxiliary verification on a pneumatic clamp installation scheme in swing head design, so that the selection of the pneumatic clamp and the selection of installation modes are more flexible and diversified; and meanwhile, certain use effect verification can be carried out on the self-developed pneumatic forceps holder, and the self-making process of the pneumatic forceps holder is promoted.

Description

Technical Field

[0001] The utility model relates to the technical field of swing head component testing, in particular to a pneumatic clamping test bench. Background Art

[0002] Pneumatic clamps are an essential component of the swing head of CNC machine tools. There are two types of pneumatic clamps: internal clamps and external clamps. How to choose a suitable pneumatic clamp is a problem that is bound to be encountered in the design of the swing head. At present, the selection of pneumatic clamps in the design of the swing head mainly depends on the samples provided by the supplier, and the use of pneumatic clamps also depends on the standard usage methods provided by the supplier, which limits the design of the swing head structure to a certain extent.

[0003] Therefore, if a clamp test bench can be designed to test the maximum torque of the pneumatic clamp and the rotation angle under different torques, and then measure the rotational stiffness of the clamp, it can assist in verifying the installation scheme of the pneumatic clamp on the swing head design, making the selection and installation method of the pneumatic clamp more flexible and diversified, and also be able to verify the use effect of the self-developed pneumatic clamp to a certain extent, thereby promoting the homemade process of the pneumatic clamp. Utility Model Content

[0004] In order to solve the above technical problems, the utility model proposes a pneumatic clamp test bench with a new structure to test the maximum torque of the pneumatic clamp and the rotation angle under different torques.

[0005] As the first aspect of the utility model, the specific technical solution of the utility model is to provide a pneumatic clamp test bench, including a fixing mechanism and a rotating mechanism, the fixing mechanism includes a bracket, a bearing seat and an inner-clamping pneumatic clamp connected by fasteners, the rotating mechanism includes a force rod, a torque sensor, a sensor base, an axis core, a sleeve and a rotation angle test assembly connected by fasteners, the sleeve is set in the inner-clamping pneumatic clamp, and a bearing is arranged between the axis core and the bearing seat to realize the connection between the rotating mechanism and the fixing mechanism.

[0006] As the second aspect of the utility model, the specific technical solution of the utility model is to provide a pneumatic clamp test bench, including a fixing mechanism and a rotating mechanism, the fixing mechanism includes a bracket, a bearing seat and a second sleeve connected by fasteners, the rotating mechanism includes a force rod, a torque sensor, a sensor base, an axis core, an external clamp type pneumatic clamp and a rotation angle test assembly connected by fasteners, the external clamp type pneumatic clamp is sleeved in the second sleeve, and a bearing is arranged between the axis core and the bearing seat to realize the connection between the rotating mechanism and the fixing mechanism.

[0007] Preferably, the force application rod comprises a connected extension rod and a tooling, the extension rod radially extends out of the tooling to receive external force, and the tooling is used to connect to a torque sensor.

[0008] In some embodiments, the rotation angle testing assembly includes a connecting block and a displacement monitoring extension rod, the connecting block is connected to the shaft core via a fastener, and the displacement monitoring extension rod extends radially outward and is connected to the connecting block via a fastener.

[0009] In some embodiments, the rotation angle testing assembly includes an angle encoder connected to a shaft core.

[0010] Preferably, both the inner-clamping pneumatic pliers and the outer-clamping pneumatic pliers are connected to a booster cylinder via an air pipe, and the booster cylinder is connected to an air source via an air pipe.

[0011] Preferably, the pneumatic clamp test bench further comprises a frame, the bracket is configured as a plate-like structure to be fixedly and vertically arranged on the top of the frame, and the plate-like structure is offset at one end of the top of the frame.

[0012] Preferably, the shaft core is constructed with two ends, and the force rod, torque sensor, and sensor base are connected in sequence and then connected to one end of the shaft core through the sensor base and fasteners, and the external clamping pneumatic clamp and rotation angle testing assembly are both connected to the other end of the shaft core, and the rotation angle testing assembly is arranged in the center.

[0013] Preferably, the shaft core is constructed with two ends, and the force rod, torque sensor, and sensor base are connected in sequence and then connected to one end of the shaft core through the sensor base and fasteners, and the sleeve and rotation angle test assembly are both connected to the other end of the shaft core, and the rotation angle test assembly is arranged in the center.

[0014] Beneficial effects:

[0015] The utility model can test the maximum torque of the pneumatic clamp and the rotation angle under different torques through the setting of the fixing mechanism and the rotating mechanism, and then measure the rotation stiffness of the clamp, so as to assist in verifying the installation scheme of the pneumatic clamp on the swing head design, so that the selection and installation method of the pneumatic clamp are more flexible and diversified, and can also verify the use effect of the self-developed pneumatic clamp to a certain extent, thereby promoting the homemade process of the pneumatic clamp. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a partial three-dimensional structural schematic diagram of the pneumatic clamp test bench of the utility model (internal clamp type).

[0017] Figure 2It is a partial three-dimensional structural schematic diagram of the pneumatic clamp test bench of the utility model (internal clamp type, the frame structure of the frame has been removed).

[0018] Figure 3 It is a partial cross-sectional structural schematic diagram of the pneumatic clamp test bench of the utility model (internal clamp type).

[0019] Figure 4 The utility model is a partial cross-sectional structural schematic diagram of a pneumatic clamp test bench (external clamp type).

[0020] As shown in the figure:

[0021] Force rod 1, extension rod 1-1, tooling 1-2;

[0022] Torque sensor 2, sensor base 3;

[0023] Axle core 4, shaft neck end 4-1, fastening end 4-2;

[0024] Turntable bearing 5, bearing seat 6, bracket 7, inner clamp type pneumatic clamp 8, sleeve 1 9, connecting block 10, displacement monitoring extension rod 11, outer clamp type pneumatic clamp 12, sleeve 2 13;

[0025] The frame 100 , the base plate 200 , and the support plate 300 . DETAILED DESCRIPTION

[0026] The following will be combined with the accompanying drawings to clearly describe the technical solutions in the specific embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the following embodiments are within the scope of protection of the utility model.

[0027] In order to realize the test of the maximum torque and the rotation angle under different torques of the pneumatic clamp, and then facilitate the measurement of the rotational stiffness of the clamp, to assist in the verification of the pneumatic clamp installation scheme on the swing head design, so that the selection of pneumatic clamps and the selection of installation methods are more flexible and diversified, and also to realize a certain use effect verification of the self-developed pneumatic clamps, and promote the homemade process of pneumatic clamps, the utility model proposes a pneumatic clamp test bench with a new structure, which can effectively realize the test of the maximum torque and the rotation angle under different torques of the pneumatic clamp through the coordinated setting of a fixing mechanism and a rotating mechanism.

[0028] The specific structure of the pneumatic clamp test bench of the utility model is described in detail below with reference to specific embodiments.

[0029] Embodiment 1

[0030] refer to Figure 1-Figure 4In this embodiment, a pneumatic clamp test bench with a new structure is provided. The pneumatic clamp test bench includes a fixing mechanism and a rotating mechanism. The rotating mechanism is connected to the fixing mechanism through a turntable bearing 5.

[0031] Specifically, the fixing mechanism includes a bracket 7, a bearing seat 6 and an inner clamp pneumatic clamp 8 connected by fasteners, wherein the bracket 7 is configured as a plate-like structure, and the pneumatic clamp test bench also includes a frame 100. In this embodiment, the plate-like structure is fixedly erected on the top of the frame 100, and the plate-like structure is offset at one end of the top of the frame 100, so that the other end of the top of the frame 100 is vacant, leaving enough force application space for external force application during testing. In this embodiment, the specific structure of the frame 100 can be a roughly rectangular frame structure, and in order to make the bracket 7 stably arranged on the top of the frame structure, a bottom plate 200 is provided at one end of the top of the frame structure, and the bracket 7 is centered and erected on the bottom plate 200, and support plates 300 are also provided on both sides of the bracket 7 to stabilize the bracket 7. Secondly, regarding the connection between the bearing seat 6 and the bracket 7, specifically, the bracket 7 is constructed as a plate structure and is provided with a mounting hole (not marked), and the bearing seat 6 is sleeved in the mounting hole, and the end of the bearing seat 6 axially extending from the mounting hole is radially convex and pressed against the end face of the bracket 7, and the radially convex end of the bearing seat 6 is also fastened to the end of the bracket 7 by a fastener, i.e., a screw, thereby, under the dual connection of the sleeve and the fastener, the bearing seat 6 and the bracket 7 are fixedly connected. The inner clamp type pneumatic clamp 8 is fastened to the unexposed end of the bearing seat 6 by a fastener, i.e., a screw. It can be seen that after the bracket 7, the bearing seat 6 and the inner clamp type pneumatic clamp 8 are arranged by the above-mentioned connection structure, the overall connection is reliable and firm, and constitutes a connected whole.

[0032] In this embodiment, the slewing mechanism includes a force rod 1, a torque sensor 2, a sensor base 3, a shaft core 4, a sleeve 9 and a rotation angle test assembly connected by fasteners. The rotation angle test assembly includes a connecting block 10 and a displacement monitoring extension rod 11, wherein the connecting block 10 is connected to the shaft core 4 by fasteners, and the displacement monitoring extension rod 11 extends outward along the radial direction of the connecting block 10 and is connected to the connecting block 10 by fasteners. Thus, a micrometer (not shown) can be set at the end of the displacement monitoring extension rod 11. It should be noted that, for the force rod 1, in this embodiment, the force rod 1 includes a connected extension rod 1-1 and a tooling 1-2, wherein the extension rod 1-1 radially extends out of the tooling 1-2 to receive external force, and the tooling 1-2 is used to connect the torque sensor 2.

[0033] For the connection of the various components of the slewing mechanism, refer to Figure 3, the shaft core 4 is constructed with two ends, the force rod 1, torque sensor 2, sensor base 3 are connected in sequence through the ends and then connected to the left end of the shaft core 4 through the sensor base 3 and fasteners, while the sleeve 19 and the rotation angle test assembly are connected to the right end of the shaft core 4, and the rotation angle test assembly is arranged in the middle. It should be noted that the right end of the shaft core 4 has a fastening end 4-2 with a larger outer diameter and a shaft neck end 4-1 with a smaller outer diameter, the connecting block 10 is connected to the end wall of the shaft neck end 4-1, and the sleeve 19 is sleeved on the shaft neck end 4-1, and the end of the sleeve 19 is also connected to the end wall of the fastening end 4-2 through a fastener. It can be seen that the sleeve 19 achieves a stable connection under the dual connection of the sleeve and the fastener.

[0034] In order to effectively detect the inner-clamp pneumatic clamp 8, the sleeve 9 is sleeved in the inner-clamp pneumatic clamp 8, and the shaft core 4 is sleeved in the bearing seat 6, and a turntable bearing 5 is arranged between the two to realize the connection between the rotating mechanism and the fixed mechanism. It should be noted that the inner-clamp pneumatic clamp 8 is also connected to the booster cylinder (not shown) through an air pipe, and the booster cylinder is connected to the air source (not shown) through an air pipe, so that the inner-clamp pneumatic clamp 8 can lock the sleeve 9 when testing in the locked state, so that the rotating mechanism and the fixed mechanism can be kept relatively still within the maximum torque of the pneumatic clamp.

[0035] Specifically, when the pneumatic clamp test bench is working, it is necessary to apply force at the end of the force rod 1 (A, refer to Figure 1 ) applies an upward force through a jack (not shown) at the end of the displacement detection extension rod 11 (B, reference Figure 1 ) Press a micrometer, and with the action of the jack, the rear end of the force rod 1 will be subjected to an upward force, forcing it to drive the torque sensor 2 to rotate. In the locked state, the internal clamping pneumatic clamp 8 will lock the sleeve 9, so that the slewing mechanism and the fixed mechanism can remain relatively still within the maximum torque of the pneumatic clamp. At this time, the torque sensor 2 is subjected to torsion, and the torque applied to the torque sensor 2 will be displayed on the external controller; press a micrometer at the end of the displacement monitoring extension rod 11, and the change in the micrometer reading can reflect the relative rotation between the slewing mechanism and the fixed mechanism.

[0036] On the whole, the rotary mechanism is constructed into a rotary whole through the specific connection of the above-mentioned components, which are basically arranged and connected in a linear manner, and the overall structure is arranged in an orderly, regular and compact manner.

[0037] The following is a detailed introduction to the inspection process of the pneumatic clamp test bench.

[0038] When the pneumatic clamp test bench is working, it is necessary to apply force at the end of the force rod 1 (A, refer to Figure 1) applies an upward force through a jack (not shown) at the end of the displacement detection extension rod 11 (B, reference Figure 1 ) Press a micrometer (not shown) and record the distance L from the pressure point to the center of the circle and the reading X of the micrometer. Connect the pneumatic clamp, booster cylinder, and air source through the air pipe, so that the pneumatic clamp is in the working state of Pn=6Bar and boost=6Bar, and lock the pneumatic clamp. Increase the force applied by the jack, and pay attention to the reading of the micrometer. When the reading of the micrometer changes, read the torque on the external torque sensor controller and the absolute value of the change in the micrometer value ΔX and record the data. The jack continues to increase the force, so that the micrometer reading continues to change. Record the current torque and ΔX every time the torque reaches a hundred; as the force applied by the jack increases, when the micrometer reading is found to change suddenly, record the peak torque and stop increasing the force. By arranging the data, the maximum torque of the pneumatic clamp and the rotation angle arctan (ΔX / L) of the clamp under different torques can be obtained.

[0039] Of course, in other embodiments, holes may be drilled at the end of the force application rod 1 and the frame 100 , and screws may be used for connection, and nuts may be used in conjunction with the ends of the force application rods 1 to replace the function of the jack to apply an upward force to the force application rod 1 .

[0040] In other embodiments, a long sleeve may be provided on the fixing mechanism as an angle encoder base (not shown), and the angle encoder (not shown) is connected to the shaft core 4, and can be used to replace the functions of the connecting block 10, the displacement monitoring rod 11 and the micrometer to directly read the rotation angle of the pneumatic clamp. In this case, the rotation angle test assembly includes an angle encoder, and the angle encoder is connected to the shaft core 4.

[0041] Embodiment 2

[0042] Different from the first embodiment, see Figure 4 The fixing mechanism in the pneumatic clamp test bench of this embodiment includes a bracket 7, a bearing seat 6 and a sleeve 13 connected by fasteners, and the rotating mechanism includes a force rod 1, a torque sensor 2, a sensor base 3, an axis core 4, an external clamp type pneumatic clamp 12 and a rotation angle test assembly connected by fasteners. The external clamp type pneumatic clamp 12 is sleeved in the sleeve 13, and a turntable bearing 5 is arranged between the axis core 4 and the bearing seat 6 to realize the connection between the rotating mechanism and the fixing mechanism.

[0043] Regarding the connection of the various components of the rotating mechanism, specifically, the shaft core 4 is constructed with two ends, and the force rod 1, torque sensor 2, and sensor base 3 are connected in sequence and then connected to one end of the shaft core 4 through the sensor base 3 and fasteners, and the external clamping pneumatic clamp 12 and the rotation angle test assembly are both connected to the other end of the shaft core 4, and the rotation angle test assembly is arranged in the center.

[0044] It can be seen that the pneumatic clamp test bench in this embodiment is mainly used to detect the outer clamp pneumatic clamp 12. At this time, the outer clamp pneumatic clamp 12 is sleeved in the sleeve 2 13. The outer clamp pneumatic clamp 12 is a component of the rotary mechanism and is connected to the end of the shaft core 4. The working principle of the outer clamp pneumatic clamp test bench in this embodiment is basically the same as that of the inner clamp pneumatic clamp test bench in the first embodiment, so it will not be repeated here.

[0045] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A pneumatic clamp test bench, characterized in that: It includes a fixing mechanism and a rotating mechanism, wherein the fixing mechanism includes a bracket, a bearing seat and an inner-clamping pneumatic clamp connected by fasteners, and the rotating mechanism includes a force rod, a torque sensor, a sensor base, an axis core, a sleeve and a rotation angle test assembly connected by fasteners, and the sleeve is set in the inner-clamping pneumatic clamp, and a bearing is arranged between the axis core and the bearing seat to realize the connection between the rotating mechanism and the fixing mechanism.

2. The pneumatic clamp test bench according to claim 1, characterized in that: The shaft core is constructed with two ends, and the force rod, torque sensor, and sensor base are connected in sequence and connected to one end of the shaft core through the sensor base and fasteners. The sleeve and the rotation angle test assembly are both connected to the other end of the shaft core, and the rotation angle test assembly is arranged in the center.

3. A pneumatic clamp test bench, characterized in that: It includes a fixing mechanism and a rotating mechanism, wherein the fixing mechanism includes a bracket, a bearing seat and a second sleeve connected by fasteners, and the rotating mechanism includes a force rod, a torque sensor, a sensor base, an axis core, an external clamping pneumatic clamp and a rotation angle test assembly connected by fasteners, wherein the external clamping pneumatic clamp is sleeved in the second sleeve, and a bearing is arranged between the axis core and the bearing seat to realize the connection between the rotating mechanism and the fixing mechanism.

4. The pneumatic clamp test bench according to claim 1 or 3, characterized in that: The force application rod comprises a connected extension rod and a tooling, wherein the extension rod radially extends out of the tooling to receive external force, and the tooling is used to connect a torque sensor.

5. The pneumatic clamp test bench according to claim 1 or 3, characterized in that: The rotation angle test assembly comprises a connection block and a displacement monitoring extension rod, wherein the connection block is connected to the shaft core via a fastener, and the displacement monitoring extension rod extends radially outward and is connected to the connection block via a fastener.

6. The pneumatic clamp test bench according to claim 1 or 3, characterized in that: The rotation angle testing assembly comprises an angle encoder, and the angle encoder is connected to the shaft core.

7. The pneumatic clamp test bench according to claim 1 or 3, characterized in that: The inner-clamping pneumatic clamp and the outer-clamping pneumatic clamp are both connected to the booster cylinder through an air pipe, and the booster cylinder is connected to the air source through the air pipe.

8. The pneumatic clamp test bench according to claim 1 or 3, characterized in that: The pneumatic clamp test bench also includes a frame, the bracket is configured as a plate-like structure to be fixedly and vertically arranged on the top of the frame, and the plate-like structure is offset at one end of the top of the frame.

9. The pneumatic clamp test bench according to claim 3, characterized in that: The shaft core is constructed with two ends, and the force rod, torque sensor, and sensor base are connected in sequence and then connected to one end of the shaft core through the sensor base and fasteners. The external clamping pneumatic clamp and rotation angle test assembly are both connected to the other end of the shaft core, and the rotation angle test assembly is arranged in the center.

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