CN204308644U - The novel clamp system of tool for case body fixture - Google Patents

Abstract

The utility model discloses a novel clamping mechanism of a box tooling fixture, which comprises a tooling frame and a clamping cylinder. It enters into the inner cavity of the product workpiece and is controlled by the hinge mechanism to slide left and right to clamp or loosen the clamping block of the product workpiece. The clamping cylinder is fixed and installed on the bottom surface of the tooling frame longitudinally. The piston rod of the clamping cylinder and the hinge mechanism phase hinge. The utility model has the advantages of simple structure, convenient disassembly and maintenance, small friction loss, convenient operation, etc., and can meet the clamping requirements of box-like workpieces.

Description

A New Clamping Mechanism for Box Fixtures

technical field

The utility model relates to the design structure and manufacturing technology of mechanical tooling, in particular to a clamping mechanism of a box tooling fixture, specifically a novel clamping mechanism of a box body tooling fixture of a side push clamping type.

Background technique

The basic requirements for fixture design are: on the premise of meeting the expected functions, strive for high efficiency, low cost, and beautiful appearance; the fixture should have sufficient strength and rigidity; it should be safe, reliable, easy to operate, and easy to maintain within the predetermined service life . When processing workpieces on machine tools, fixtures must be installed to clamp the workpieces to be processed. When the workpiece is processed on the machine tool, in order to ensure the machining accuracy and improve productivity, the workpiece must occupy the correct position on the machine tool relative to the tool. This process is called positioning. Clamping the workpiece is to apply force to the workpiece so that it can reliably clamp the workpiece at a predetermined position. This process is called clamping. The whole process from positioning to clamping is called clamping. The main function of the machine tool fixture is to complete the clamping work of the workpiece.

In the prior art, common fixtures are usually pressed from the top, bottom or side of the workpiece. Such fixtures are more common, their structure is relatively simple, and their production is relatively easy. However, due to different customer needs, many workpieces The structure is different, the processing position is also different, so the pressing method is also different. The above-mentioned fixtures all have a common feature, that is, the movement direction of the clamping cylinder is consistent with the clamping direction. However, this clamp cannot be applied to box-type products. If the above-mentioned method is used to clamp the box-type products, it may cause deformation and scrapping of such products. At this point, a clamping tool that can be clamped from the inner cavity of this type of product is required.

Contents of the invention

The technical problem to be solved by the utility model is to provide a safe, reliable, accurate, high-efficiency and new clamping mechanism for box tooling fixtures that can meet the clamping requirements of box-type workpieces in view of the current situation of the above-mentioned prior art.

The technical solution adopted by the utility model to solve the above-mentioned technical problems is: a new clamping mechanism of the box tooling fixture, including a tooling frame and a clamping cylinder. The high-degree hinge mechanism and the clamping end surface extend into the inner cavity of the product workpiece and are controlled by the hinge mechanism to slide left and right to clamp or loosen the clamping block of the product workpiece. The clamping cylinder is fixed longitudinally on the bottom surface of the tooling frame. The piston rod of the clamping cylinder is hinged with the hinge mechanism.

In order to optimize the above technical solutions, the measures taken also include:

The above-mentioned tooling frame includes a frame bottom plate arranged horizontally, and one end of the upper end surface of the frame bottom plate is longitudinally fixedly installed with a positioning block adapted to the design reference plane of the product workpiece and used to clamp and fix the product workpiece with the clamping block and a positioning block for clamping and fixing the product workpiece. The supporting block for slidingly supporting the product workpiece, the hinge mechanism and the clamping block are located on the upper end surface of the frame bottom plate between the supporting block and the positioning block.

The upper end surface of the above-mentioned tooling rack is fixedly provided with a guide block that slides and cooperates with the side of the product workpiece to guide the movement direction of the product workpiece, and the positioning block is provided with a positioning bump that is positioned and matched with the hole on the design reference surface of the product workpiece.

The above-mentioned clamping block is a clamping block in an L-shaped structure which is composed of a horizontal slide plate and a longitudinal pressing plate. The clamping end face is the outer end face of the longitudinal pressing plate. The third pin shaft passes through the shaft hole of the slide plate to cooperate with the hinge of the hinge mechanism.

A guiding and positioning block is arranged on the upper surface of the above-mentioned frame bottom plate, and the center of the guiding and positioning block is formed with a guiding slide hole, and a horizontal slide plate is slidably penetrated through the guiding sliding hole of the guiding and positioning block.

The above-mentioned clamping cylinder is longitudinally fixedly installed on the bottom surface of the frame bottom plate, and the front end of the piston rod of the clamping cylinder is screw-mounted with a cylinder connecting rod, and the cylinder connecting rod passes through the connecting rod hole of the frame bottom plate and is hinged with the hinge mechanism.

The above-mentioned hinge mechanism comprises a first linkage plate and a second linkage plate which are hinged; There is a strip-shaped sliding hole, the front end of the second linkage plate is made with a pin hole, the first linkage plate, the second linkage plate and the connecting rod of the cylinder pass through the second pin shaft in sequence to pass through the phase hinge, the second linkage plate The rear end is connected with the clamping block through the third pin shaft.

A connecting block is arranged on the bottom plate of the above-mentioned frame, and the front end of the first linkage plate is pivotally hinged on the connecting block through the first pin shaft.

Compared with the prior art, the utility model is equipped with a hinge mechanism that can rotate the push-pull movement direction of the clamping cylinder by 90 degrees, and the clamping end surface extends into the inner cavity of the product workpiece and is controlled by the hinge mechanism. The clamping block for clamping or loosening the product workpiece is horizontally slid left and right, and the clamping cylinder is longitudinally fixed and installed on the bottom surface of the tooling frame, and the piston rod of the clamping cylinder is hinged with the hinge mechanism. The fixture of the utility model is pressed from the inner cavity of the product workpiece, so it can meet the processing requirements of box products with large surfaces such as milling and reaming. The utility model takes the design reference plane of the product workpiece as the positioning reference of the tooling, and rotates the force direction of the clamping cylinder by 90° through the hinge structure, and then presses the inner cavity on one side of the product workpiece so that it can meet the processing requirements. While the product workpiece is positioned and clamped, it will not interfere with the tool during the entire large face milling of the part. However, the usual fixture structure cannot meet this processing requirement, so the utility model is very suitable for similar box products, and it is applied to the hinge clamping mechanism as a force-increasing mechanism that can change the force direction. It has the advantages of simple structure, easy disassembly and maintenance, small friction loss, and convenient operation.

Description of drawings

Fig. 1 is a working state diagram when the utility model and the product workpiece are in a clamped state;

Fig. 2 is a state schematic diagram when the utility model and the product workpiece are in a relaxed state;

Fig. 3 is a structural schematic diagram after removing the product workpiece in Fig. 1;

Fig. 4 is a structural representation of removing product workpieces in Fig. 2;

Fig. 5 is a schematic structural view of the clamping block in Fig. 1;

Fig. 6 is a schematic structural view of the hinge mechanism in Fig. 1;

Fig. 7 is a schematic structural view of the product workpiece in Fig. 1 .

Detailed ways

Embodiments of the utility model are described in further detail below in conjunction with the accompanying drawings.

Fig. 1 to Fig. 6 are structural schematic diagrams of the utility model, and Fig. 7 is a structural schematic diagram of a product workpiece clamped by the utility model.

The reference signs are: product workpiece A, design reference plane B, first pin shaft L1, second pin shaft L2, third pin shaft L3, tooling frame 1, frame bottom plate 11, connecting block 12, clamping Cylinder 2, hinge mechanism 3, first linkage plate 31, second linkage plate 32, clamping block 4, clamping end face 4a, slide plate shaft hole 4b, horizontal slide plate 41, longitudinal pressure plate 42, positioning block 5, positioning protrusion Block 51, supporting block 6, guiding block 7, guide positioning block 8, cylinder connecting rod 9.

Fig. 1 to Fig. 6 are structural diagrams of the utility model, wherein Fig. 1 and Fig. 2 are state structural diagrams of the utility model in operation. As shown in the figure, the new clamping mechanism of the box tooling fixture of the utility model includes a tooling frame 1 and a clamping cylinder 2. The tooling frame 1 is equipped with a device that can rotate the direction of the push-pull movement of the clamping cylinder 2 by 90 degrees. The hinge mechanism 3 and the clamping end surface 4a extend into the inner cavity of the product workpiece A and are controlled by the hinge mechanism 3 to slide left and right to clamp or loosen the clamping block 4 of the product workpiece A, and the clamping cylinder 2 is fixed longitudinally on the tooling The bottom surface of the frame 1, the piston rod of the clamping cylinder 2 is hinged with the hinge mechanism 3 . The tooling fixtures in the prior art are generally not suitable for box-type products, and cannot effectively clamp and position such products. The utility model utilizes the clamping cylinder 2 to push the hinge mechanism 3, and through the hinge mechanism 3, the direction of the clamping cylinder 2 moving up and down is converted into the direction of horizontal left and right movement, thereby controlling the clamping block 4 to position and clamp the product workpiece A to keep the workpiece The correct position obtained in the positioning does not move and vibrate, and then realizes the precision processing of the product. Because the utility model can be pressed from the inner cavity of the product workpiece, it can meet the processing requirements of box products with large surfaces such as milling and reaming. The hinge mechanism 3 can not only change the direction of the force, but also increase the force. It has the advantages of simple structure, easy disassembly and maintenance, small friction loss, and convenient operation.

In the embodiment, the tooling frame 1 includes a frame bottom plate 11 arranged horizontally, and one end of the upper end surface of the frame bottom plate 11 is longitudinally fixedly installed with a design reference plane B of the product workpiece A and is used for clamping with the clamping block 4. Tightly fix the positioning block 5 of the product workpiece A and the support block 6 for slidingly supporting the product workpiece A, the hinge mechanism 3 and the clamping block 4 are located on the upper end surface of the frame bottom plate 11 between the support block 6 and the positioning block 5.

In the embodiment, the upper end surface of the tooling frame 1 is fixedly provided with a guide block 7 which slides and cooperates with the side of the product workpiece A to guide the movement direction of the product workpiece A, and the positioning block 5 is arranged on the design reference plane B of the product workpiece A. The positioning protrusions 51 that are positioned in the holes are matched.

In the embodiment, the clamping block 4 is a clamping block in an inverted L-shaped structure composed of a horizontal slide plate 41 and a longitudinal pressing plate 42, the clamping end face 4a is the outer end face of the longitudinal pressing plate 42, and the front end of the smooth plate 41 is formed with The slide shaft hole 4b, the clamping block 4 passes through the slide shaft hole 4b through the third pin shaft L3 and cooperates with the hinge of the hinge mechanism 3 .

In the embodiment, a guide positioning block 8 is arranged on the upper end surface of the frame bottom plate 11, and the center of the guide positioning block 8 is formed with a guide slide hole. The guide positioning block 8 is the basis for ensuring that the clamping block 4 moves smoothly.

In the embodiment, the clamping cylinder 2 is fixed longitudinally on the bottom surface of the frame bottom plate 11, and the front end of the piston rod of the clamping cylinder 2 is screw-mounted with a cylinder connecting rod 9, and the cylinder connecting rod 9 passes through the connecting rod hole of the frame bottom plate 11. Hinge with hinge mechanism 3.

In the embodiment, the hinge mechanism 3 includes a first linkage plate 31 and a second linkage plate 32 that are hinged; The rear end of a linkage plate 31 is shaped on a strip-shaped sliding hole, and the front end of the second linkage plate 32 is shaped on a pin hole, and the first linkage plate 31, the second linkage plate 32 and the cylinder connecting rod 9 pass through the second linkage. The pin shafts L2 pass through the phase hinges sequentially, and the rear end of the second linkage plate 32 is connected to the clamping block 4 via the third pin shaft L3. The strip-shaped sliding hole can make the second pin shaft L2 slide relatively left and right in the hole. The strip-shaped sliding hole is the basis for the normal operation of the whole mechanism, otherwise the first linkage plate 31 cannot change the first linkage plate through the strip-shaped sliding hole. The relative length of 31.

In the embodiment, a connection block 12 is provided on the frame bottom plate 11, and the front end of the first linkage plate 31 is rotatably hinged on the connection block 12 via the first pin shaft L1.

In the utility model, to ensure that the stroke of the clamping cylinder 2 must be greater than the minimum space distance required for loading and unloading the product workpiece A, and the working stroke of the clamping cylinder 2 must be shorter than the full stroke of the cylinder to ensure that the workpiece is in a clamped state.

The operating steps of the utility model are as follows:

1. When clamping, first place the workpiece and close the positioning block, turn on the pneumatic switch, and make the cylinder connecting rod 9 of the clamping cylinder retract, the first linkage plate 31 and the second linkage plate 32 move downward, This drives the clamping block 4 to move, and at the same time pushes the product workpiece A to move to the right, so that the product workpiece A design reference B is close to the positioning block 5, so as to realize the positioning and clamping of the workpiece. After the processing is completed, turn off the pneumatic switch to connect the cylinder The rod 9 stretches out, and the first linkage plate 31 and the second linkage plate 32 move upwards, driving the clamping block 4 to move to the left, so that it has a certain distance from the product workpiece A, so as to move out quickly with the workpiece.

Claims (8)

1. the novel clamp system of tool for case body fixture, comprise frock frame (1) and clamping cylinder (2), it is characterized in that: described frock frame (1) is equipped with the clamp (4) that the linkage (3) of the push-and-pull direction of motion 90-degree rotation of clamping cylinder (2) and clamping end face (4a) can be extend in product workpiece (A) inner chamber horizontally slip by this linkage (3) level of control clamping or product workpiece (A) that get loose, described clamping cylinder (2) is longitudinally fixedly mounted on the bottom surface of frock frame (1), piston rod and linkage (3) the phase hinge of this clamping cylinder (2).

2. the novel clamp system of tool for case body fixture according to claim 1, it is characterized in that: described frock frame (1) comprises horizontally disposed framework soleplate (11), one end, upper surface of this framework soleplate (11) is longitudinally installed with suitable with the design basis face (B) of product workpiece (A) for coordinating clamp (4) to be fixedly clamped the locating piece (5) of product workpiece (A) and the back-up block (6) for sliding support product workpiece (A), described linkage (3) and clamp (4) are positioned on the upper surface of the framework soleplate (11) between back-up block (6) and locating piece (5).

3. the novel clamp system of tool for case body fixture according to claim 2, it is characterized in that: described frock frame (1) upper surface is fixedly installed the guiding block (7) coordinating with product workpiece (A) side slip and be used for correcting product workpiece (A) direction of motion, described locating piece (5) is provided with the locating convex block (51) with the hole location fit on product workpiece (A) design basis face (B).

4. the novel clamp system of tool for case body fixture according to claim 3, it is characterized in that: described clamp (4) is the clamp in the L shape structure of falling be made up of horizontal slide plate (41) and longitudinal pressing plate (42), the outer face that described clamping end face (4a) is longitudinal pressing plate (42), the front end of described horizontal slide plate (41) is shaped with slide plate axis hole (4b), and described clamp (4) matches with linkage (3) hinge through slide plate axis hole (4b) through the 3rd bearing pin (L3).

5. the novel clamp system of tool for case body fixture according to claim 4, it is characterized in that: described framework soleplate (11) upper surface is provided with guide-localization block (8), the center of this guide-localization block (8) is shaped with guiding slide opening, and described horizontal slide plate (41) and guide-localization block (8) slide opening that leads slides to wear and matches.

6. the novel clamp system of tool for case body fixture according to claim 5, it is characterized in that: described clamping cylinder (2) is longitudinally fixedly mounted on the bottom surface of framework soleplate (11), the front end spiral of this clamping cylinder (2) piston rod is provided with cylinder connecting rod (9), and described cylinder connecting rod (9) is through the tie rod holes of framework soleplate (11) and linkage (3) phase hinge.

7. the novel clamp system of tool for case body fixture according to claim 6, is characterized in that: described linkage (3) comprises the first interlock plate (31) and second interlock plate (32) of hinge cooperation; Front end first bearing pin (L1) turning joint of described the first interlock plate (31) is in frock frame (1), the rear end of this first interlock plate (31) is shaped with bar shaped slide opening, the front end of described the second interlock plate (32) is shaped with pin shaft hole, described the first interlock plate (31), the second interlock plate (32) and cylinder connecting rod (9) wear phase hinge successively through the second bearing pin (L2), and the rear end the 3rd bearing pin (L3) of described the second interlock plate (32) is connected with clamp (4).

8. the novel clamp system of tool for case body fixture according to claim 7, it is characterized in that: described framework soleplate (11) is provided with contiguous block (12), front end first bearing pin (L1) turning joint of described the first interlock plate (31) is on contiguous block (12).