CN206263659U - A kind of lateral surface compressing fixture - Google Patents

Abstract

The utility model provides a side clamping fixture, which comprises a fixed jig assembly for workpiece positioning, and also includes a top-extension clamping mechanism; the top-extension clamping mechanism includes a support, a cylinder and a pressure head; The cylinder body of the cylinder is fixed on the support, and the extension direction of the cylinder is set toward the fixture assembly; the pressure head is fixedly connected with the end of the piston rod of the cylinder, so that the pressure head and the fixture assembly clamp the workpiece opposite to each other when the cylinder is extended. The utility model can adopt the automatic clamping of the cylinder.

Description

A side clamp

technical field

The utility model relates to the field of fixture equipment, in particular to a side pressing fixture.

Background technique

Please refer to Fig. 1. The fixture of the CNC machining center used in the prior art uses a screw lock cover plate to compress the product. Every time the product is positioned, the screw needs to be assembled and disassembled, which is equivalent to an assembly process. This brings about problems such as low clamping efficiency, too long time for dismounting and assembling clamps, and the operator's work intensity is high, which greatly affects production efficiency. Moreover, the screws are easy to deform the product, the pre-tightening force is difficult to control, and the noise generated by disassembling and assembling the screws seriously affects the working environment.

It is not difficult to see that there are certain defects in the prior art.

Utility model content

The technical problem to be solved by the utility model is to provide a side clamping fixture, which adopts an air cylinder for automatic clamping and ensures that the workpiece will not be damaged.

In order to achieve the above object, the utility model adopts the following technical solutions:

A side clamping fixture comprises a fixed jig assembly for workpiece positioning, and also includes a top-extension clamping mechanism; the top-extension clamping mechanism includes a support, a cylinder and a pressure head; the cylinder body of the cylinder is fixed on On the support, the extension direction of the cylinder is set toward the fixture assembly; the pressure head is fixedly connected with the end of the piston rod of the cylinder, so that the pressure head and the fixture assembly face and clamp the workpiece when the cylinder is extended.

Further, the indenter includes a rigid backing plate and a flexible pressing plate made of flexible material, the flexible pressing plate is arranged on the outer surface of the backing plate and is arranged toward one side of the jig assembly.

Further, a bearing insert is fixed at the end of the piston rod, and a bearing is sleeved on the bearing insert, and the bearing insert is matched with the inner ring of the bearing; The outer ring of the bearing is fitted with a socket, and the end face of the counterbore is set against the end face of the outer ring of the bearing.

Further, the bearing is a plane bearing or a tapered roller bearing.

Further, there is an interference fit between the bearing insert and the inner ring of the bearing; an interference fit between the counterbore of the backing plate and the outer ring of the bearing.

Further, the end of the bearing insert is provided with an axial extension that cooperates with the inner ring of the bearing. On the end face of the inner ring of the bearing, and the diameter of the journal is smaller than the outer diameter of the inner ring of the bearing; a center hole is provided in the center of the counterbore of the backing plate, and the diameter of the center hole is larger than the inner diameter of the outer ring of the bearing.

Further, a gap is provided between the end surface of the bearing insert and the backing plate.

Further, the center of the bearing insert is provided with a countersunk installation hole for accommodating screws, the bearing insert and the piston rod are fixedly connected by screws, and the head of the screw is embedded in the countersunk installation hole, and the countersunk installation hole The depth of the screw is greater than the head height of the screw so that the screw does not protrude beyond the countersunk mounting hole.

A side pressing fixture provided by the utility model has the following advantages:

The jacking and clamping mechanism automatically jacks and clamps through the cylinder, which has a higher degree of automation and effectively improves efficiency;

Replace the original screw unloading process, easy to operate;

There is no damage to the product, the protective effect is obvious, and the product quality is guaranteed;

It can rotate together with the workpiece during processing, and maintain stable clamping during rotation to meet processing requirements.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic diagram of a clamping structure in the prior art.

Fig. 2 is a schematic diagram of the overall structure of a side pressing fixture provided by an embodiment of the present invention.

Figure 3 is a schematic diagram of the assembly of the bearing.

Fig. 4 is a schematic diagram of the connection structure between the backing plate and the bearing insert.

Fig. 5 is a structural schematic diagram of the backing plate.

Explanation of reference signs:

1. Fixture assembly 2. Top extension clamping mechanism

3. Support 4. Cylinder

5. Pressure head 6. Backing plate

7. Flexible pressure plate 8. Bearing insert

9. Bearing 10. Counterbore

11. Axial extension 12. Journal

13. Center hole 14. Countersunk mounting hole.

detailed description

In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model and the accompanying drawings. It should be noted that the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to Fig. 2, this embodiment discloses a side pressing fixture, which includes a fixed jig assembly 1 for workpiece positioning, and also includes a top extension clamping mechanism 2; the top extension clamping mechanism 2 includes a support Seat 3, cylinder 4 and pressure head 5; the cylinder body of cylinder 4 is fixed on support 3, and the extension direction of cylinder 4 is set toward fixture assembly 1; pressure head 5 is fixedly connected with the piston rod end of cylinder 4; As a further preference, the pressure head 5 includes a rigid backing plate 6 and a flexible pressing plate 7 made of flexible material, and the flexible pressing plate 7 is arranged on the outer surface of the backing plate 6 .

Please refer to FIG. 2 to FIG. 3 , the utility model adopts the top extension clamping mechanism 2 to overcome the clamping problem, saves the operation steps of screw pre-tightening, and realizes automatic clamping through the cylinder 4 . The product is fixed on the jig assembly 1 for positioning first, and then the cylinder 4 can be operated to extend forward, driving the pressure head 5 to press against the surface of the product to complete the clamping.

Wherein, the indenter 5 is composed of a backing plate 6 and a flexible pressing plate 7. The flexible pressing plate 7 directly contacts the surface of the product, which can ensure that the surface of the product will not be scratched by rigid parts, effectively ensuring the quality of the product.

See Fig. 3 to Fig. 5 for details, as a further preference, a bearing insert 8 is fixed at the end of the piston rod, and a bearing 9 is sleeved on the bearing insert 8, and the inner ring of the bearing insert 8 and the bearing 9 is matched Connect; the backing plate 6 center is provided with a counterbore 10, the inner wall of the counterbore 10 is fitted with the outer ring of the bearing 9, and the end face of the counterbore 10 is set against the end face of the outer ring of the bearing 9. The end of the bearing insert 8 is provided with an axial extension 11 that cooperates with the inner ring of the bearing 9, and the back side of the axial extension 11 is provided with a journal 12 extending radially outward, and the front end of the journal 12 is The surface is set on the end face of the inner ring of the bearing 9, and the diameter of the journal 12 is smaller than the outer diameter of the inner ring of the bearing 9; the center of the counterbore 10 of the backing plate 6 is provided with a central hole 13, and the diameter of the central hole 13 is larger than that of the bearing 9 The inside diameter of the outer ring. Specifically, the interference fit between the bearing insert 8 and the inner ring of the bearing 9 is preferred; the interference fit between the counterbore 10 of the backing plate 6 and the outer ring of the bearing 9 is also preferred. Then there will be no relative sliding between the inner ring of the bearing 9 and the bearing insert 8, between the outer ring of the bearing 9 and the backing plate 6, and the connection can be made more stable and firm, and it will not be loose during the working process. The end face of the journal 12 provides an axial pressing force to the inner ring of the bearing 9 , so that sufficient axial pressing force can be provided during the working process of the indenter 5 . The diameter of the journal 12 is smaller than the outer diameter of the inner ring of the bearing 9, which means that after installation, a part of the inner ring of the bearing 9 still protrudes from the journal 12, so that it is convenient to apply pressure to the end face of the inner ring of the bearing 9 during disassembly. The axial force separates the bearing 9 from the bearing insert 8 . Similarly, the diameter of the center hole 13 of the backing plate 6 is larger than the inner diameter of the outer ring of the bearing 9, which also means that after installation, a part of the outer ring of the bearing 9 still protrudes from the center hole 13. When dismounting, only the pair of bearings needs to pass through the center hole 13 The end face of the outer ring of 9 applies an axial force to separate the bearing 9 from the backing plate 6 .

In this embodiment, the indenter 5 is in the shape of a disc as a whole, and in order to cooperate with the action of the CNC machining center, it is required that the indenter 5 can rotate around the center. As mentioned above, the backing plate 6 can slide relative to the bearing insert 8 through the bearing 9. When the cylinder 4 is extended and clamped, the bearing insert 8 is fixed, and the backing plate 6 can Rotate around the center through the bearing 9. And the bearing 9 is mainly used in the rotation process, which not only ensures the smoothness of the rotation, can bear the axial load, provides sufficient axial pressure, but also makes the overall rotation of the pressure head 5 stable, ensuring that the rotation process will not be affected by shaking. Precision.

The bearing 9 can be a plane bearing or a tapered roller bearing, which can be selected according to requirements. Plane bearings are also called thrust bearings and are used to bear axial loads. Tapered roller bearings, on the other hand, can bear both axial and radial loads. Whether tapered roller bearings need to be used can be evaluated according to the actual situation, specifically to determine whether radial loads may be received during the compaction process. Moreover, relative rotation needs to be generated between the bearing insert 8 and the backing plate 6, so a gap is preferably set between the end surface of the bearing insert 8 and the backing plate 6, so as to avoid mutual interference between the rotations of the two.

As a further preference, the center of the bearing insert 8 is provided with a countersunk mounting hole 14 for accommodating screws, the bearing insert 8 and the piston rod are fixedly connected by screws, and the head of the screw is embedded in the countersunk mounting hole 14 Inside, the depth of the countersunk head mounting hole 14 is greater than the head height of the screw, so that the screw will not protrude out of the countersunk head mounting hole 14 .

The side clamping fixture provided by the utility model adopts the top-extension clamping mechanism 2 to automatically top-extend and clamp through the cylinder 4, which has a higher degree of automation and effectively improves efficiency. Replace the original screw unloading process, the operation is simpler and more convenient, and the labor intensity of the operator is reduced. Moreover, the flexible press plate 7 is in contact with the product without damage to the product, effectively guaranteeing product quality. The unique rotatable design enables the indenter 5 to rotate together with the workpiece during processing, and maintain stable clamping during the rotation to meet processing requirements.

The above-mentioned embodiment only expresses one implementation mode of the utility model, and its description is relatively specific and detailed, but it should not be understood as a limitation to the patent scope of the utility model. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the scope of protection of the utility model patent should be based on the appended claims.

Claims (8)

1. a kind of lateral surface compressing fixture, an including fixed jig component for workpiece positioning, it is characterised in that：Also include Stretch clamp system in top；Clamp system is stretched on the top includes bearing, cylinder and pressure head；The cylinder body of cylinder is fixed on bearing, gas Stretch direction and set towards jig component in the top of cylinder；Pressure head is fixedly connected with the piston rod end of cylinder, when stretching cylinder top pressure head with Jig component clamps workpiece in opposite directions.

2. lateral surface compressing fixture according to claim 1, it is characterised in that：The pressure head includes rigid backing plate and flexibility The flexible pressing plate that material is made, flexible pressing plate is set located at the outer surface of backing plate towards the side of jig component.

3. lateral surface compressing fixture according to claim 2, it is characterised in that：The end of the piston rod is fixed with an axle Mold insert is held, a bearing is arranged with bearing mold insert, bearing mold insert coordinates socket with the inner ring of bearing；Backing plate center is provided with one and sinks Hole, the inwall of counterbore coordinates the end face of socket, counterbore to support on the end face of bearing outer ring with the outer ring of bearing.

4. lateral surface compressing fixture according to claim 3, it is characterised in that：The bearing is plane bearing or taper roller Bearing.

5. lateral surface compressing fixture according to claim 3, it is characterised in that：Between the bearing mold insert and the inner ring of bearing Interference fit；Interference fit between the counterbore of the backing plate and the outer ring of bearing.

6. lateral surface compressing fixture according to claim 3, it is characterised in that：The end of the bearing mold insert is provided with and bearing The axially-extending portion that inner ring coordinates, the dorsal part of axially-extending portion is provided with the axle journal for extending radially outward, and the front end face of axle journal is supported On the end face of bearing inner race, and axle journal diameter less than bearing inner race external diameter；The center of the counterbore of backing plate is provided with center Hole, the internal diameter of the aperture more than bearing outer ring of centre bore.

7. lateral surface compressing fixture according to claim 3, it is characterised in that：Between the end face and backing plate of the bearing mold insert Gap is set.

8. lateral surface compressing fixture according to claim 3, it is characterised in that：The center of the bearing mold insert is provided with for holding Receive the counter sunk mounting holes of screw, bearing mold insert is screwed with piston rod and is connected, and the head of screw is embedded at countersunk head peace Inside dress hole, the height of head of the depth more than screw of counter sunk mounting holes makes screw not protrude from outside counter sunk mounting holes.