Zero point positioning mechanism of processing machine

Abstract

A zero-point positioning mechanism for a processing machine is used in a clamping fixture of the processing equipment, which includes a fixed bed and a locking fixture; the fixed bed provides the locking fixture assembly, and the locking fixture is used to clamp a processing object; the locking fixture is provided with an air-hydraulic cylinder, and the pushing unit of the air-hydraulic cylinder drives the sliding component to move to position the processing object. Since the sliding component is hidden under the fixture plate, processing interference can be avoided; in addition, the pushing direction of these pushing members is located at a 45-degree angle between the two sliding members, so that the sliding members are pushed synchronously to a 45-degree angle when pushed, which has the advantages of average thrust, labor saving and synchronous average positioning, and can make the sliding members move smoothly.

Description

Technical Field

[0001] The invention relates to a clamping device used for a processing machine, in particular to a zero point positioning mechanism of the processing machine. Background Art

[0002] In the field of automatic processing, the most troubling issue for operators is the ease of use and stability of the workpiece. Although manual loading and unloading is quite convenient, manual positioning of the workpiece has the problem of uneven locking force. Insufficient or excessive locking force will cause problems. For example, insufficient locking force may sometimes cause the workpiece to detach from the fixture, or excessive locking force may cause deformation of the workpiece. Therefore, most of the current fixtures have been moving towards fixtures that use stable media such as air pressure and oil pressure.

[0003] In addition, some workpieces require not only accurate processing positions but also high processing precision. Currently, a common practice is to provide at least one movable positioning unit on the jig, so that the workpiece can be assembled on the jig for processing. However, the movable positioning unit must be removed before cutting. Failure to remove the positioning unit may cause processing interference or mechanical problems.

[0004] Furthermore, the above structure requires considerable time to calibrate the positions of the fixture and the positioning unit, which greatly increases the manufacturing cost of the industry.

[0005] It is worth mentioning that some manufacturers have designed a zero-point positioning fixture based on the concept of a dividing plate. The dividing plate is provided with at least four pushable rods and an active push rod. When in use, the active push rod rotates and then links these rods to move, thereby clamping the workpiece. However, the problem with this type of product is that using only one push rod can easily cause uneven movement of the linked rods, resulting in jamming and unsmooth clamping. When jamming occurs frequently, it may be that the inner wall of the assembled rod has been worn, which also causes concerns about inaccurate processing positions.

[0006] How to improve the problems caused by existing fixtures is a topic that relevant industries are actively trying to solve. Summary of the invention

[0007] The main purpose of the present invention is to provide a zero-point positioning mechanism for a processing machine, comprising: a fixed bed, a pneumatic and hydraulic cylinder, and a locking fixture;

[0008] The fixed bed is provided with at least one installation area, and the aforementioned installation area provides the locking fixture assembly;

[0009] The locking fixture is used to clamp and position a workpiece, and the locking fixture includes a fixed body, a set of sliding components and a fixture plate in order from bottom to top;

[0010] The aforementioned pneumatic and oil-hydraulic cylinder drives a piston to form a linear movement through hydraulic oil. The pneumatic and oil-hydraulic cylinder is arranged below the fixed body. The central axis of the pneumatic and oil-hydraulic cylinder is provided with the piston. The piston is driven by hydraulic oil or compressed air to make the piston move linearly along the installation direction. A pushing unit is arranged on the top of the piston.

[0011] The aforementioned fixed body is installed in the installation area of ​​the fixed bed, and the center of the fixed body has a through hole corresponding to the pushing unit;

[0012] The sliding assembly is installed above the fixed body and is driven by the pushing unit. The sliding assembly is composed of two groups of pushing members and four sliding members. The two groups of pushing members are respectively installed on both sides of the through hole and are symmetrical. The pushing member has a long bottom side and two inclined connecting edges. A plurality of assembly holes are provided on the long bottom side. Each assembly hole is used to install a plurality of elastic bodies. The elastic bodies connect the two pushing members. When the two pushing members are pushed by the pushing unit, the two pushing members can be restored to their original positions by using these elastic bodies. The four sliding members are respectively installed on the connecting edges of the two pushing members. Each sliding member is provided with a conical positioning portion on one side relative to the connecting edge.

[0013] The jig plate is mounted on the upper end of the fixed body and covers the sliding assembly, thereby constraining the movable position of the sliding assembly; the jig plate has a first surface and a second surface, and a plurality of connection holes and four latch holes penetrating the jig plate are provided on the first surface, and the jig plate is locked to the upper end of the fixed body through a plurality of coupling bolts; a groove is concavely provided on the second surface, and the groove can accommodate the sliding assembly, and the groove is provided with a plurality of diagonally arranged slide grooves, and the slide grooves provide the sliding members to slide therein, and the bottoms of the slide grooves are connected to the latch holes, and the positioning portion can extend into or not contact the latch holes, and the latch holes provide a workpiece to be placed thereon;

[0014] The jig plate is mounted on the upper end of the fixed body and covers the sliding assembly, thereby constraining the movable position of the sliding assembly; the jig plate has a first surface and a second surface, and a plurality of connection holes and four latch holes penetrating the jig plate are provided on the first surface, and the jig plate is locked to the upper end of the fixed body through a plurality of coupling bolts; a groove is concavely provided on the second surface, and the groove can accommodate the sliding assembly, and the groove is provided with a plurality of diagonally arranged slide grooves, and the slide grooves provide the sliding members to slide therein, and the bottoms of the slide grooves are connected to the latch holes, and the positioning portion can extend into or not contact the latch holes, and the latch holes provide a workpiece to be placed thereon;

[0015] In an embodiment of the present invention, the pushing unit is provided with a symmetrical inclined guide surface, and an arc surface for connecting two guide surfaces is further provided at the upper ends of the guide surfaces.

[0016] In an embodiment of the present invention, the first surface of the fixture plate further includes a positioning groove.

[0017] In an embodiment of the present invention, the jig plate is further provided with a demolding device, and the jig plate is further provided with a demolding hole. A demolding rod is provided inside the aforementioned demolding hole, and the aforementioned demolding rod can just contact any one of the pushing members, so that the two pushing members are pushed by the demolding rod to return to their original positions.

[0018] In an embodiment of the present invention, the zero-point positioning mechanism is further connected to a controller, and the controller is used to drive the piston of the air-oil hydraulic cylinder to move, thereby moving the sliding assembly to clamp and position the workpiece.

[0019] In an embodiment of the present invention, the pushing directions of the pushing members are located at an angle of 45 degrees between the two sliding members, so that the sliding members are pushed synchronously to the angle of 45 degrees.

[0020] Through the above description, the advantages that the present invention can obtain are as follows:

[0021] 1. To improve the current problem of inaccurate positioning of the fixture, the push unit of the air-hydraulic cylinder is used to drive the sliding component to move and position the workpiece. Since the sliding component is hidden under the fixture plate, processing interference can be avoided.

[0022] 2. The device of the present invention uses a pushing unit to push the pushing member in two directions, thereby causing the sliding member to slide obliquely, which can allow the sliding component to slide stably and avoid the sliding component from getting stuck.

[0023] 3. The equipment provided by the present invention can be connected to the processing equipment and provided with hydraulic and other driving means, without the need to prepare additional driving sources, thus increasing the convenience of use and being a key technology for automating the entire factory.

[0024] 4. Since the pushing direction of the two pushing members is located at a 45-degree angle between the two sliding members, the sliding members are pushed synchronously to a 45-degree angle, which has the effects of average thrust, labor saving and synchronous average positioning, avoiding the laborious problem caused by the vertical thrust of the four sliding members in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A perspective view of the present invention;

[0026] Figure 2 An exploded perspective view of the present invention;

[0027] Figure 3The structural diagram of the fixed bed;

[0028] Figure 4 An exploded view of the structure of the fixed body and the gas and oil pressure cylinder;

[0029] Figure 5 yes Figure 4 AA section view;

[0030] Figure 6 It is a schematic diagram of the combination of the fixed body and the gasoline pressure cylinder;

[0031] Figure 7 Structural diagram of the fixed body and the sliding assembly;

[0032] Figure 8 Sliding component action diagram;

[0033] Fig. 9 A structural stereogram of the jig plate;

[0034] Fig.10 A three-dimensional view of the jig plate from another side;

[0035] Fig.11 It is a state diagram of the present invention when it is not in action;

[0036] Fig.12 It is a state diagram of the action of the present invention;

[0037] Fig.13 This is a diagram showing the use status of the demoulding device.

[0038] Description of Reference Numerals

[0039] 100, fixed bed; 10, installation area; 200, locking fixture; 300, air and oil cylinder;

[0040] 301, piston; 302, pushing unit; 303, guiding surface; 304, arc surface;

[0041] 30. Fixed body; 31. Perforation; 40. Sliding assembly; 41. Pushing member;

[0042] 411, long bottom edge; 412, connecting edge; 413, assembly hole 42, sliding member 421, positioning portion

[0043] 50, jig plate; 51, first surface; 511, connecting hole; 512, latch hole; 513, positioning groove;

[0044] 52, second surface; 521, groove; 522, slide groove; 53, demoulding device; 531, demoulding hole;

[0045] 532. Ejector rod; 60. Elastomer. DETAILED DESCRIPTION

[0046] See also Figure 1 , Figure 2 The zero-point positioning mechanism of the processing machine of the present invention mainly includes: a fixed bed 100, a locking fixture 200, and a pneumatic and hydraulic cylinder 300.

[0047] like Figure 2 , Figure 3 As shown, the fixed bed platform 100 is provided with at least one installation area 10, and the aforementioned installation area 10 provides the locking fixture 200 for assembly.

[0048] like Figure 1 , Figure 2 As shown, the locking fixture 200 is used to clamp and position a workpiece W. The locking fixture 200 includes a fixed body 30, a set of sliding components 40 and a fixture plate 50 in order from bottom to top.

[0049] like Figure 2 , Figures 4 to 8 As shown, the aforementioned gas-oil hydraulic cylinder 300 drives a piston 301 to form linear movement through hydraulic oil. The gas-oil hydraulic cylinder 300 is arranged below the fixed body 30. The central axis of the gas-oil hydraulic cylinder 300 is provided with the piston 301. The piston 301 is driven by hydraulic oil or compressed air to make the piston 301 linearly displace along the installation direction. A pushing unit 302 is provided on the top of the piston 301. The pushing unit 302 is provided with a symmetrical inclined guide surface 303, and an arc surface 304 for connecting two guide surfaces 303 is also provided at the upper end of these guide surfaces 303.

[0050] like Figure 2 , Figures 4 to 8 As shown, the aforementioned fixed body 30 is installed in the installation area 10 of the fixed bed platform 100 , and the center of the fixed body 30 has a through hole 31 corresponding to the pushing unit 302 .

[0051] like Figure 2 , Figures 4 to 8As shown, the sliding assembly 40 is installed above the fixed body 30 and is driven by the pushing unit 302. The sliding assembly 40 is composed of two groups of pushing members 41 and four sliding members 42. The two groups of pushing members 41 are respectively installed on both sides of the through hole 31 and are symmetrical. The pushing member 41 has a long bottom side 411 and two inclined connecting edges 412. A plurality of assembly holes 413 are provided on the long bottom side 411. Each assembly hole 413 is used to install a plurality of elastic bodies 60. The elastic bodies 60 connect the two pushing members 41. When the two pushing members 41 are pushed by the pushing unit 302, the two pushing members 41 can be restored to their original positions by using these elastic bodies 60. The four sliding members 42 are respectively installed on each connecting edge 412 of the two pushing members 41. Each sliding member 42 is provided with a conical positioning portion 421 on one side of the connecting edge 412. The pushing direction of the pushing members 41 is located at a 45 degree angle between the two sliding members 42 , so that the sliding members 42 are pushed synchronously to a 45 degree angle, which has the advantages of even thrust, labor saving and synchronous and even positioning.

[0052] like Figure 1 , Figure 2 , Figures 9 and 10 As shown, the jig plate 50 is installed on the upper end of the fixed body 30 and covers the sliding component 40 at the same time, thereby constraining the movable position of the sliding component 40; the jig plate 50 has a first surface 51 and a second surface 52, and a plurality of connecting holes 511 and four latch holes 512 that penetrate the jig plate 50 are provided on the first surface 51, and the jig plate 50 is locked on the upper end of the fixed body 30 by a plurality of coupling bolts; a groove 521 is concavely provided on the second surface 52, and the groove 521 can just accommodate the sliding component 40, and the groove 521 is provided with a plurality of diagonally arranged slide grooves 522, and the slide grooves 522 provide these sliding members 42 to slide therein, and the bottoms of these slide grooves 522 are just connected to these latch holes 512, and the positioning portion 421 can extend into or not contact these latch holes 512, and these latch holes 512 provide a workpiece to be placed thereon. Preferably, the first surface 51 of the fixture plate 50 further includes a positioning groove 513 .

[0053] like Fig.11 As shown, it shows the inactive state of the present invention. In the unused state, the two pushers 41 of the sliding assembly 40 are pulled by the elastic bodies 60, so that the positioning portions 421 of the sliding members 42 are retracted into the inside of the slide grooves 522 without contacting the workpiece W.

[0054] like Figure 6 , Figure 7 , Figure 8 , Fig.12As shown, in the state of use, the piston 301 of the air-oil hydraulic cylinder 300 is driven by the hydraulic oil to move upward; the pushing unit 302 extends out of the through hole 31 of the fixed body 30, and then the two pushing members 41 are pushed open by the pushing unit 302; the two pushing members 41 push the sliding members 42 along the slide grooves 522 in a pushing direction respectively, so that each positioning portion 421 extends out of the latch holes 512, and the workpiece W is restrained and positioned.

[0055] like Fig.13 As shown, the jig plate 50 is also provided with a demolding device 53. The jig plate 50 is also provided with a demolding hole 531. A demolding rod 532 is provided inside the aforementioned demolding hole 531. The aforementioned demolding rod 532 can just contact any one of the pushing members 41, so that the two pushing members 41 are pushed by the demolding rod 532 to return to their original positions.

[0056] In addition to the above description, the present invention is also connected to a controller (not shown), which is used to drive the piston 301 of the air-oil hydraulic cylinder 300 to move, thereby moving the sliding assembly 40 to clamp and position the workpiece W.

[0057] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Claims

1. A zero point positioning mechanism for a processing machine, characterized in that: include: A fixed bed, a locking fixture, and an air-hydraulic cylinder; The fixed bed is provided with at least one installation area, and the aforementioned installation area provides the locking fixture assembly; The locking fixture is used to clamp and position a workpiece, and the locking fixture includes a fixed body, a set of sliding components and a fixture plate in order from bottom to top; The aforementioned pneumatic and oil-hydraulic cylinder drives a piston to form linear movement through hydraulic oil or compressed air. The pneumatic and oil-hydraulic cylinder is arranged below the fixed body. The central axis of the pneumatic and oil-hydraulic cylinder is provided with the piston. The hydraulic oil drives the piston so that the piston moves linearly along the installation direction. A pushing unit is arranged on the top of the piston. The aforementioned fixed body is installed in the installation area of ​​the fixed bed, and the center of the fixed body has a through hole corresponding to the pushing unit; The sliding assembly is installed above the fixed body and is driven by the pushing unit. The sliding assembly is composed of two groups of pushing members and four sliding members. The two groups of pushing members are respectively installed on both sides of the through hole and are symmetrical. The pushing member has a long bottom side and two inclined connecting edges. A plurality of assembly holes are provided on the long bottom side. Each assembly hole is used to install a plurality of elastic bodies. The elastic bodies connect the two pushing members. When the two pushing members are pushed by the pushing unit, the two pushing members can be restored to their original positions by using these elastic bodies. The four sliding members are respectively installed on the connecting edges of the two pushing members. Each sliding member is provided with a conical positioning portion on one side relative to the connecting edge. The jig plate is installed on the upper end of the fixed body and covers the sliding assembly at the same time, thereby constraining the movable position of the sliding assembly; the jig plate has a first surface and a second surface, and a plurality of connection holes and four latch holes penetrating the jig plate are provided on the first surface, and a plurality of coupling bolts lock the jig plate on the upper end of the fixed body; a groove is concavely provided on the second surface, and the groove can accommodate the sliding assembly, and the groove is provided with a plurality of diagonally arranged slide grooves, and the slide grooves provide the sliding members to slide therein, and the bottoms of the slide grooves are connected to the latch holes, and the positioning portion extends into or does not contact the latch holes, and the latch holes provide a workpiece to be placed thereon; When not in use, the two pushers of the sliding assembly are pulled by the elastic bodies, and the positioning parts of the sliding parts are retracted into the inside of the slide grooves without contacting the workpiece; when in use, the piston of the air-oil hydraulic cylinder is driven by the hydraulic oil to move upward; the pushing unit extends out of the through hole of the fixed body, and the pushing unit pushes the two pushing members open; the two pushing members push in a direction respectively so that the sliding members follow the slide grooves and the positioning parts extend out of the latch holes, so as to restrain and position the workpiece.

2. The zero point positioning mechanism of a processing machine according to claim 1, characterized in that: The pushing unit is provided with a symmetrical inclined guide surface, and the upper ends of the guide surfaces are also provided with an arc surface for connecting two of the guide surfaces.

3. The zero point positioning mechanism of a processing machine according to claim 1, characterized in that: The first surface of the fixture plate also includes a positioning groove.

4. The zero point positioning mechanism of a processing machine according to claim 1, characterized in that: The jig plate is also provided with a demoulding device, and the jig plate is also provided with a demoulding hole. A demoulding rod is provided inside the demoulding hole. The demoulding rod can contact any push member, so that the two push members are pushed by the demoulding rod to return to their original positions.

5. The zero point positioning mechanism of a processing machine according to claim 1, characterized in that: The zero-point positioning mechanism is also connected to a controller, which is used to drive the piston of the air-oil hydraulic cylinder to move, thereby moving the sliding component so as to clamp and position the workpiece.

6. The zero point positioning mechanism of a processing machine according to claim 1, characterized in that: The pushing directions of the pushing members are located at a 45-degree angle between the two sliding members, so that the sliding members are pushed synchronously to the 45-degree angle when being pushed.

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