Multi-station zero-point clamp

Abstract

The utility model relates to a multi-station zero-point clamp which is provided with a supporting base and clamping assemblies, a plurality of concave die cavities are formed in the upper side face of the supporting base, the clamping assemblies are assembled corresponding to the die cavities, and synchronous work of the clamping assemblies on the die cavities is achieved. The multi-station zero-point clamp has the advantages that the problem of pain points in production can be well solved, the multi-station zero-point clamp is suitable for precision machining, multi-hole cooperative positioning and clamping and locking of the locking steel balls, quick clamping, centering and positioning can be realized, and the production efficiency is improved; meanwhile, the clamping assemblies on the multiple mold cavities work synchronously, so that the effects of one-time clamping and multi-station machining, reducing repeated positioning and clamping, improving the machining efficiency and precision of parts, reducing the rejection rate, overcoming the inconvenience of production and manufacturing and saving the labor cost are achieved, the practicability is higher, the automatic production requirement is met, and application and popularization are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing, in particular to a pneumatic zero-point clamp used in precision mechanical processing. Background Art

[0002] When turning workpieces on CNC lathes and ordinary lathes, the workpieces need to be clamped. However, when using traditional clamping structures for clamping, the clamping time is long, and it is not easy to center and position. Repeated trial clamping is required, and the positioning surface is easily damaged. Especially in the process of repeated trial clamping in mass production, it not only affects the production and processing efficiency, but also affects the centering and positioning accuracy of the workpiece. There are also adverse consequences caused by slag padding during production, which reduces the processing accuracy of the workpiece. At the same time, in the processing of conventional mechanical parts, some polyhedrons need to be processed, and multiple reversing clamping is required to complete the part processing, which will reduce the processing efficiency of the parts, reduce the accuracy, and increase the scrap rate. In this context, this application proposes a multi-station zero-point clamp, which is the application in this case. Summary of the invention

[0003] The utility model aims to provide a multi-station zero-point clamp with fast clamping speed, accurate and stable positioning, and can also meet multi-faceted processing and reduce reversing clamping.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] Multi-station zero-point fixture, which has:

[0006] A support seat, wherein the upper side of the support seat is provided with an inwardly concave mold cavity, the mold cavity is arranged in an array according to the geometric dimensions of the support seat, and the support seat is also provided with a plurality of external air holes, which are connected to the mold cavity through air passages preset inside the support seat;

[0007] A clamping assembly, which is assembled corresponding to the mold cavity of the support seat and realizes the synchronous operation of the clamping assemblies on multiple mold cavities; the clamping assembly includes a positioning rivet, a piston, a top cover and a locking steel ball, the positioning rivet is embedded in the bottom layer of the mold cavity and is sealed with the inner peripheral wall of the mold cavity, and the positioning rivet is provided with a middle column protruding upward, and a middle hole opening upward is provided inside the middle column; the locking steel ball is arranged on the middle column and can expand and contract around the center line of the middle hole; the top cover is fixed on the support seat and covers the port of the mold cavity, and the top cover is provided with a positioning hole, a protruding positioning column and an inner ring edge protruding from the lower side of the top cover into the mold cavity; there are multiple positioning columns and they are uniformly The inner ring edge is sealed and connected with the inner wall of the mold cavity, so that the positioning pin, the top cover and the mold cavity enclose a piston chamber, and the piston chamber is connected with the corresponding external air hole; the piston is sleeved on the middle column of the positioning pin and placed in the piston chamber, so that the piston can move up and down along the middle column; a driving part is provided on the piston, and the driving part follows the movement of the piston and establishes a locking state and a releasing state. In the locking state, the driving part drives the locking steel balls to retract toward the center line direction of the middle hole; in the releasing state, the driving part releases the locking steel balls so that the locking steel balls can move freely.

[0008] The above scheme is further provided with a spring between the piston and the positioning pin, and the spring supports the piston so that the piston drives the driving part to establish a normal locking state.

[0009] The above scheme is further that the upper end of the positioning column has a horizontal positioning surface, and the positioning surface is provided with a blowing hole; an annular air duct is also constructed between the top cover and the support seat, which connects the blowing holes on multiple positioning columns together, and is connected with the corresponding external air holes on the support seat through the annular air duct to realize air intake and chip blowing.

[0010] The above scheme is further that the locking steel ball is arranged on the end head of the center column, and the driving part is a protruding ring platform on the upper side of the piston, so that the driving part is erected after assembly to form a wall state surrounding the outside of the locking steel ball, and a driving contact surface and a horn surface extending outward from the driving contact surface are provided on the inner side of the driving part; the driving contact surface is used to contact and push the locking steel ball so that the locking steel ball is gathered toward the center line direction of the center hole; the horn surface provides an avoidance space so that the locking steel ball is released; the driving part is sealingly connected to the inner ring edge of the top cover, so that the driving part moves against the inner ring edge.

[0011] The above solution is further characterized in that the upper top surface of the top cover is an arc surface extending downwardly from the outer periphery of the positioning hole.

[0012] After adopting the above structure, the multi-station zero-point clamp of the utility model can well solve the pain points in production, is suitable for precision machining, and can quickly clamp, center and position through the positioning hole on the top cover and the middle hole of the middle column, as well as the clamping and locking of the locking steel ball, thereby improving production efficiency; at the same time, the clamping components on multiple mold cavities work synchronously, which plays a role in one-time clamping and multi-station processing, reduces repeated positioning and clamping, improves the efficiency and accuracy of parts processing, reduces the scrap rate, overcomes the inconvenience of production and manufacturing, saves labor costs, is more practical, meets the needs of automated production, and is conducive to promotion and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Attached Figure 1 This is a schematic diagram of the structure of a preferred embodiment of the utility model;

[0014] Attached Figure 2 for Figure 1 A schematic diagram of a partial structural decomposition of an embodiment;

[0015] Attached Figure 3 for Figure 1 A schematic cross-sectional view of a local structure of an embodiment;

[0016] Attached Figure 4 for Figure 1 A schematic diagram of the structure decomposition of the clamping assembly of the embodiment;

[0017] Attached Figure 5 for Figure 4 A schematic diagram of the local structural combination of an embodiment. DETAILED DESCRIPTION

[0018] The concept, specific structure and technical effects of the utility model will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the utility model.

[0019] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0020] See also Figure 1 , 2, 3, 4, and 5 are schematic diagrams of preferred embodiments of the present invention. The present invention is related to a multi-station zero-point clamp, which has a support seat 1 and a clamping assembly. The support seat 1 of this embodiment is a plate structure, which is used to connect to corresponding machinery and equipment and provide corresponding installation space; the upper side of the support seat 1 is provided with a concave mold cavity 11, and the mold cavity 11 is arranged in an array according to the geometric dimensions of the support seat 1. Preferably, the mold cavity 11 is arranged in a matrix to obtain a better spacing space to meet the needs of multi-position clamping and processing. The support seat 1 is also provided with a plurality of external air holes 12, and the external air holes 12 are connected to the mold cavity 11 through the air passages preset inside the support seat, thereby realizing pneumatic effects such as pressurization, blowing, and loosening. The clamping assembly is assembled corresponding to the mold cavity 11 of the support seat, and realizes the synchronous operation of the clamping assemblies on the plurality of mold cavities 11, which is conducive to the implementation of clamping and is also convenient for control. The clamping assembly includes a positioning rivet 2, a piston 3, a top cover 4 and a locking steel ball 5. The positioning rivet 2 is embedded in the bottom layer of the mold cavity 11 and is sealed with the inner wall of the mold cavity 11, and the positioning rivet 2 is provided with an upwardly protruding middle column 21. The middle column 21 is provided with a middle hole 211 with an upward opening to meet the insertion and installation of the subsequent mounting pins on the workpiece, and the middle hole 211 can also be used to discharge debris and prevent chip jamming. The locking steel ball 5 is arranged on the middle column 21 and can expand and contract around the center line of the middle hole 211 to clamp or release the mounting pins set on the workpiece, so as to achieve workpiece fixation and disassembly. The top cover 4 is fixed on the support seat 1 and covers the port of the mold cavity 11. Preferably, the top cover 4 is locked with screws, is removable, is easy to assemble and maintain, and can obtain a tight connection effect. The top cover 4 is provided with a positioning hole 41, a raised positioning column 42 and an inner ring edge 43 protruding from the lower side of the top cover into the mold cavity 11. There are multiple positioning columns 42 that are evenly distributed on the outer periphery of the positioning hole 41, which are used for positioning to improve the accuracy and stability of workpiece clamping. The positioning hole 41 forms a vertically opposite relationship with the middle hole 211 of the middle column 21, which is convenient for the insertion of the mounting pin set on the workpiece, and can be quickly clamped, centered, and positioned, thereby improving production efficiency. The inner ring edge 43 is sealed and connected to the inner peripheral wall of the mold cavity 11, adding a connection structure, and the positioning rivet 2, the top cover 4 and the mold cavity 11 enclose a piston chamber, and the piston chamber is connected to the corresponding external air hole 12 for subsequent input of air pressure for pressurization or loosening. The piston 3 is sleeved on the middle column 21 of the positioning rivet and placed in the piston chamber, so that the piston 3 can move up and down along the middle column, and the movement of pressurization or loosening is achieved by air pressure drive. A driving part 31 is provided on the piston 3, and the driving part 31 moves with the piston 3 and establishes a locking state and a releasing state. In the locking state, the piston performs a pressurizing movement, and the driving part 31 drives the locking steel ball 5 to retract toward the center line direction of the center hole 211 to clamp and lock the workpiece; in the releasing state, the piston performs a loosening movement, and the driving part 31 releases the locking steel ball 5 so that the locking steel ball 5 can move freely, and the workpiece can be loaded and unloaded at this time.

[0021] Figure 2 , 3 As shown in , 4, and 5, in this embodiment, a spring 6 is further provided between the piston 3 and the positioning rivet 2. The spring 6 supports the piston 3, so that the piston 3 drives the driving part 31 to establish a normal locking state, which has a pressure-maintaining effect, allowing the locking steel ball to continuously close and lock the workpiece, meeting the need for continuous clamping of the workpiece. The spring 6 is arranged around the center column, and the number and specifications of the spring 6 are selected according to actual needs.

[0022] The upper end of the positioning column 42 of the top cover has a horizontal positioning surface 421, which increases the positioning and installation of the workpiece and self-leveling, and a blowing hole 422 is provided on the positioning surface 421; further, an annular air duct 44 is also constructed between the top cover 4 and the support seat 1, and the annular air duct 44 connects the blowing holes 422 on multiple positioning columns 42 together, and is connected with the corresponding external air holes 12 on the support seat 1 through the annular air duct 44, so as to realize air intake and chip blowing, achieve self-cleaning effect, and prevent slag accumulation from affecting the clamping work.

[0023] Figure 2 , 3 As shown in Figures 4 and 5, in this embodiment, the locking steel ball 5 is arranged on the end of the middle column 21, and the driving part 31 is a protruding ring on the upper side of the piston 3, so that the driving part 31 is erected after assembly to form a wall state around the outside of the locking steel ball 5, further restricting the locking steel ball and facilitating subsequent driving work. A driving contact surface 311 and a horn surface 312 extending outward from the driving contact surface are provided on the inner side of the driving part 31; the driving contact surface 311 is used to contact and push the locking steel ball 5, so that the locking steel ball 5 is retracted toward the center line direction of the middle hole 211; the horn surface 312 provides an escape space, so that the locking steel ball 5 is released; thus, through the movement of the driving part 31, the driving contact surface 311 and the horn surface 312 exchange the effect of the locking steel ball 5, thereby realizing the locking state or the release state of the locking steel ball 5, with a simple structure and stable and reliable operation. In this embodiment, the driving part 31 is sealed and connected with the inner ring edge 43 of the top cover during installation, so that the driving part 31 moves against the inner ring edge 43; the alignment assembly is simple, and the inner ring edge 43 can increase the structural property of the driving part 31 and further guide the movement of the driving part 31, ensuring that the driving part 31 drives the locking steel ball 5 to work accurately and stably.

[0024] In this embodiment, the upper top surface of the top cover 4 is an arc surface extending downward from the outer periphery of the positioning hole 41. The slope of the upper top surface can discharge processing debris by itself, achieve self-cleaning effect, and solve the slag pile problem. The external air holes 12 of this embodiment are all set on the support seat 1, which can be connected to the corresponding air source and controlled separately, thereby realizing the functions of loosening, pressurizing, and blowing of the utility model to meet the needs of automated production.

[0025] Of course, this embodiment may further add sensors to provide feedback on the locking status so as to facilitate self-monitoring and control of automated production.

[0026] Through experiments, it can be known that the multi-station zero-point clamp of the utility model can well solve the pain points in production, and is suitable for precision machining. Through the positioning hole on the top cover and the middle hole of the middle column, as well as the clamping and locking of the locking steel ball, it can quickly clamp, center, and position, thereby improving production efficiency; at the same time, the clamping components on multiple mold cavities work synchronously, which plays a role in one-time clamping and multi-station processing, reduces repeated positioning and clamping, improves the efficiency and accuracy of parts processing, reduces the scrap rate, overcomes the inconvenience of production and manufacturing, saves labor costs, is more practical, meets the needs of automated production, and is conducive to promotion and use. Of course, the multi-station of the utility model can also be used selectively, such as selecting some or all of the clamping components for clamping work as needed.

[0027] Although the preferred specific embodiments of the present invention are described above in conjunction with the accompanying drawings, the present invention should not be limited to the structures and operations that are exactly the same as the above description and the accompanying drawings. For those skilled in the art, many equivalent improvements and changes can be made to the above embodiments through logical analysis, reasoning or limited experiments without exceeding the concept and scope of the present invention, but these improvements and changes should all fall within the scope of protection required by the present invention.

Claims

1. Multi-station zero-point fixture, characterized in that: have: A support base (1), wherein an inwardly concave mold cavity (11) is provided on an upper side surface of the support base (1), the mold cavity (11) is arranged in an array according to the geometric dimensions of the support base (1), and the support base (1) is also provided with a plurality of external air holes (12), the external air holes (12) being connected to the mold cavity (11) via air passages preset inside the support base; A clamping assembly, which is assembled corresponding to the mold cavity (11) of the support seat and realizes synchronous operation of the clamping assemblies on multiple mold cavities (11); the clamping assembly comprises a positioning rivet (2), a piston (3), a top cover (4) and a locking steel ball (5); the positioning rivet (2) is embedded in the bottom layer of the mold cavity (11) and is sealed with the inner peripheral wall of the mold cavity (11), and the positioning rivet (2) is provided with an upwardly protruding middle column (21), and the middle column (21) is provided with a middle hole (211) with an opening facing upward; the locking steel ball (5) is arranged on the middle column (21) and can expand and contract around the center line of the middle hole (211); the top cover (4) is fixed on the support seat (1) and covers the port of the mold cavity (11), and the top cover (4) is provided with a positioning hole (41), a protruding positioning column (42) and an inner ring edge (43) protruding from the lower side of the top cover into the mold cavity (11); the positioning column (42) has multiple The inner ring edge (43) is sealed and connected to the inner peripheral wall of the mold cavity (11), so that the positioning pin (2), the top cover (4) and the mold cavity (11) enclose a piston chamber, and the piston chamber is connected to the corresponding external air hole (12); the piston (3) is sleeved on the middle column (21) of the positioning pin and is placed in the piston chamber, so that the piston (3) can move up and down along the middle column; the piston (3) is provided with a driving part (31), and the driving part (31) moves with the piston (3) and establishes a locking state and a release state. In the locking state, the driving part (31) drives the locking steel ball (5) to retract towards the center line direction of the middle hole (211); and in the release state, the driving part (31) releases the locking steel ball (5) so that the locking steel ball (5) can move freely.

2. The multi-station zero-point fixture according to claim 1, characterized in that: A spring (6) is further provided between the piston (3) and the positioning pin (2), and the spring (6) supports the piston (3), so that the piston (3) drives the driving part (31) to establish a normal locking state.

3. The multi-station zero-point fixture according to claim 1, characterized in that: The upper end of the positioning column (42) has a horizontal positioning surface (421), and the positioning surface (421) is provided with a blowing hole (422); an annular air channel (44) is also constructed between the top cover (4) and the support seat (1), and the annular air channel (44) connects the blowing holes (422) on the plurality of positioning columns (42) together, and is connected to the corresponding external air holes (12) on the support seat (1) through the annular air channel (44), so as to achieve air intake and chip blowing.

4. The multi-station zero-point fixture according to claim 1, characterized in that: The locking steel ball (5) is arranged on the end of the middle column (21); the driving part (31) is a protruding ring platform on the upper side of the piston (3), so that the driving part (31) is erected after assembly to form a wall state surrounding the outer side of the locking steel ball (5); a driving contact surface (311) and a horn surface (312) extending outward from the driving contact surface are provided on the inner side of the driving part (31); the driving contact surface (311) is used to contact and push the locking steel ball (5) so that the locking steel ball (5) is retracted toward the center line direction of the middle hole (211); the horn surface (312) provides an escape space so that the locking steel ball (5) is released; the driving part (31) is sealed and fitted with the inner ring edge (43) of the top cover so that the driving part (31) moves against the inner ring edge (43).

5. The multi-station zero-point fixture according to claim 1, characterized in that: The upper top surface of the top cover (4) is an arc surface extending obliquely downward from the outer periphery of the positioning hole (41).

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