CN104400453A - Workholding with Cam - Google Patents

Abstract

The invention belongs to the technical field of clamps, and particularly relates to a workpiece clamping device with a cam, which comprises the cam, a handle, a rocker block and a rotating shaft, wherein the cam is arranged on the handle; the handle is connected with the cam and can drive the cam to rotate; the workpiece is placed above the cam; the rocker arm block is arranged on one side of the cam and is in contact with the side edge of the cam; the rotating shaft is arranged on the rocker arm block, and the rocker arm block can rotate to the upper part of the workpiece around the rotating shaft and clamp the workpiece. Compared with the prior art, the invention has simple structure and convenient operation, and can compress the workpiece by only placing the workpiece above the cam and then rotating the handle to enable the rocker arm block to rotate to the upper part of the workpiece around the rotating shaft. The pressure applied to the workpiece by the rocker block is downward, so that the thin-wall workpiece can be firmly clamped, the deformation of the thin-wall workpiece can be prevented, the size precision and the shape precision of the workpiece can be ensured, the processing quality can be ensured, and the rejection rate can be reduced.

Description

Workholding with Cam

technical field

The invention belongs to the technical field of fixtures, in particular to a workpiece clamping device with a cam.

Background technique

Thin-walled workpieces have been widely used in various industrial sectors because of their light weight, material saving, and compact structure. However, the processing of thin-walled workpieces is more difficult, because the thin-walled workpieces have poor rigidity and weak strength, and are easily deformed during processing, which makes it difficult to guarantee the processing quality of the workpiece. How to improve the machining accuracy of thin-walled workpieces will be a topic of increasing concern in the industry.

When processing a workpiece, it is generally necessary to clamp the workpiece first to fix it, thereby facilitating the processing operation.

The existing workpiece clamping device can better fix the general workpiece, but for some thin-walled workpieces, the existing clamping device is easy to cause its deformation, this is because the workpiece wall is thin, the existing clamping The device generally clamps the workpiece from the edge of the workpiece, so that the workpiece is easily deformed under the action of the clamping force, thereby affecting the dimensional accuracy and shape accuracy of the workpiece. After the workpiece is processed, the quality of the workpiece cannot meet the requirements. As a result, the scrap rate increases, leading to an increase in production costs.

In view of this, it is indeed necessary to provide a workpiece clamping device containing a cam, which can reduce the deformation of the thin-walled workpiece when it is used to clamp the thin-walled workpiece, thereby reducing the scrap rate.

Contents of the invention

The object of the present invention is to provide a cam-containing workpiece clamping device for the deficiencies of the prior art, which can reduce the deformation of the thin-walled workpiece when it is used to clamp the thin-walled workpiece, thereby reducing the scrap rate.

In order to achieve the above object, the present invention adopts the following technical solutions:

Workholding device with cam, including cam, handle, rocker block and shaft;

The handle is connected to the cam, and the handle can drive the cam to rotate;

The workpiece is placed above the cam;

The rocker block is arranged on one side of the cam, and the rocker block is in contact with the side of the cam;

The rotating shaft is arranged on the rocker block, and the rocker block can rotate around the rotating shaft to above the workpiece and clamp the workpiece.

As an improvement of the workpiece clamping device containing a cam of the present invention, the cam includes a cam body and a connecting shaft connected to the cam body, the connecting shaft is located below the cam body, and the rocker block is connected to the cam body. The sides of the cam body are in contact.

As an improvement to the cam-containing workpiece clamping device of the present invention, the handle includes a gripping portion and a connecting portion, one end of the connecting portion is fixed on the connecting shaft, and the other end of the connecting portion is connected to the Grip connection.

As an improvement of the cam-containing workpiece clamping device of the present invention, there are three rocker blocks, and the angle between two adjacent rocker blocks is 60°-150°.

As an improvement of the cam-containing workpiece clamping device of the present invention, the rocker block includes a contact section in contact with the side of the cam body, a crimping section and a connecting section for pressing the workpiece, so One end of the connection section is connected to one end of the contact section, the other end of the connection section is connected to one end of the crimping section, and the rotating shaft is arranged on the connection section.

As an improvement to the cam-containing workpiece clamping device of the present invention, the crimping section includes a transverse section and an inclined section, one end of the transverse section is connected to the other end of the connecting section, and the other end of the transverse section Connect to one end of the inclined section.

As an improvement to the workpiece clamping device containing a cam of the present invention, the angle between the transverse section and the inclined section is 95°-150°, and the inclined section is inclined downward.

As an improvement to the cam-containing workpiece clamping device of the present invention, the outer surface of the other end of the inclined section is arc-shaped.

As an improvement of the cam-containing workpiece clamping device of the present invention, the connection section and the contact section are connected by an arc section.

As an improvement to the cam-containing workpiece clamping device of the present invention, an adjusting screw that can adjust the clamping force of the rocker block is connected to the contact section.

When in use, place the workpiece above the cam first, then turn the handle to make the cam rotate, and the edge of the cam drives the rocker block to rotate the rocker block around the shaft until the end of the rocker block rotates to the workpiece and the workpiece Clamp.

Compared with the prior art, the present invention has simple structure and convenient operation. It only needs to place the workpiece above the cam, and then turn the handle to make the rocker block rotate around the rotating shaft to the top of the workpiece to press the workpiece. Relative to the plane where the largest surface of the thin-walled workpiece is located, the pressure exerted by the rocker block on the workpiece is vertically downward, so that not only the thin-walled workpiece can be clamped firmly, but also the deformation of the thin-walled workpiece can be prevented to ensure The dimensional accuracy and shape accuracy of the workpiece ensure the processing quality, thereby reducing the scrap rate.

Description of drawings

Fig. 1 is a schematic diagram of the three-dimensional structure of the present invention.

Fig. 2 is a schematic top view of the structure of the present invention.

in:

1 - cam;

11-cam main body, 12-connecting shaft;

2 - handle;

21-grip; 22-connection;

3- rocker block;

31-contact section, 32-crimping section, 321-transverse section, 322-inclined section, 33-connecting section, 34-arc

Shape segment;

4- shaft;

5 - workpiece;

6-Adjustment screw.

Detailed ways

The present invention and its beneficial effects will be further described in detail below in conjunction with examples, but the embodiments of the present invention are not limited thereto.

As shown in Figures 1 and 2, the cam-containing workpiece clamping device provided by the present invention includes a cam 1, a handle 2, a rocker block 3 and a rotating shaft 4; wherein, the cam 1 is used to drive the rocker block 3 to rotate, only It is necessary to design an appropriate profile of the cam 1, so that the rocker block 3 can obtain any desired movement. Therefore, the cam 1 can realize complex movement requirements, and has a simple and compact structure.

The handle 2 is connected to the cam 1, and the handle 2 can drive the cam 1 to rotate, the rocker block 3 is arranged on one side of the cam 1, and the rocker block 3 is in contact with the side of the cam 1; thus, the handle 2 drives the cam 1 to rotate , the rocker block 3 that contacts the side of the cam 1 moves accordingly.

The workpiece 5 is placed above the cam 1; the rotating shaft 4 is arranged on the rocker block 3, and the rocker block 3 can rotate around the rotating shaft 4 to the top of the workpiece 5 and clamp the workpiece 5.

The cam 1 includes a cam body 11 and a connecting shaft 12 connected to the cam body 11 , and the connecting shaft 12 is located below the cam body 11 . The rocker block 3 is in contact with the side of the cam main body 11 . The cam main body 11 and the connecting shaft 12 are integrated, so that the rotation of the connecting shaft 12 can drive the rotation of the cam main body 11 .

The handle 2 includes a gripping portion 21 and a connecting portion 22. One end of the connecting portion 22 is fixed on the connecting shaft 12, and the other end of the connecting portion 22 is connected to the gripping portion 21. The gripping portion 21 and the connecting portion 22 are integrally formed. Wherein, the grip portion 21 is convenient for the user to hold the handle 2 so as to rotate the handle 2 . When the user holds the handle 21 and rotates it, the movement of the handle 21 is transmitted to the connecting shaft 12 through the connecting portion 22, and further to the cam main body 11, and then drives the rocker block 3 to rotate around the rotating shaft 4 to The upper surface of the workpiece 5 and press the workpiece 5 tightly.

There are three rocker blocks 3, and the angle between two adjacent rocker blocks 3 is 60°-150°. In this embodiment, the angle between two adjacent rocker blocks 3 is 120°, and the three rocker blocks 3 provide three clamping areas for the workpiece 5, so that the workpiece 5 can be firmly fixed to prevent The workpiece 5 is tilted or shifted during the machining process.

The rocker block 3 includes a contact section 31 contacting the side of the cam main body 11, a crimping section 32 and a connecting section 33 for pressing the workpiece 5, one end of the connecting section 33 is connected with one end of the contact section 31, and the connecting section 33 The other end is connected to one end of the crimping section 32 , and the rotating shaft 4 is arranged on the connecting section 33 . The contact section 31 , the crimping section 32 and the connecting section 33 are integrally formed. When the cam body 11 rotates, the irregular shape of the cam body 11 makes the surface radians of the cam body 11 contacted by the contact section 31 different, so that the entire rocker block 3 rotates around the rotating shaft 4 until the crimping section 32 reaches the bottom of the workpiece 5 Surface and press the workpiece 5.

The crimping section 32 includes a transverse section 321 and an inclined section 322 , one end of the transverse section 321 is connected to the other end of the connecting section 33 , and the other end of the transverse section 321 is connected to one end of the inclined section 322 . The included angle between the transverse section 321 and the inclined section 322 is 95° to 150°, and the inclined section 322 is inclined downward, so that when contacting the workpiece 5, only the end of the inclined section 322 can contact the workpiece 5, while the transverse section 321 Can not contact with workpiece 5, and the power that the end of inclined section 322 is applied to workpiece 5 is vertically downward (with respect to the surface where the maximum area of workpiece 5 is), so, not only clamping is firm, and workpiece 5 deformation can be prevented.

The outer surface of the other end of the inclined section 322 is arc-shaped, so that the surface of the workpiece 5 will not be damaged. If the outer surface of the other end of the inclined section 322 is in a plane shape, its edge is relatively sharp, which is easy to scratch the surface of the workpiece 5, resulting in an increase in scrap rate and production cost.

The connection segment 33 and the contact segment 31 are connected by an arc segment 34 . After being connected by the arc segment 34, the distance from the centerline of the cam body 11 to the plane of the surface of the connection segment 33 near the cam body 11 side is less than the distance from the center line of the cam body 11 to the contact segment 31 near the cam body 11 side. The distance in the plane of the surface.

An adjustment screw 6 that can adjust the clamping force of the rocker block 3 is also connected to the contact section 31 . By adjusting the adjusting screw 6 , the vertical downward force exerted by the inclined section 322 on the workpiece 5 can be adjusted.

When in use, first place the workpiece 5 above the cam body 11, then hold the handle 21, turn the handle 2 to rotate the connecting shaft 12 and the cam body 11, and the rotation of the cam body 11 drives the contact section 31 in contact with it , so that the entire rocker block 3 rotates around the rotating shaft 4 until the arc-shaped portion of the inclined section 322 of the rocker block 3 rotates to the surface of the workpiece 5 and clamps the workpiece 5 . At this point, the workpiece 5 can be processed. If it is necessary to increase or decrease the force of the rocker block 3 on the workpiece 5, only the adjustment screw 6 needs to be rotated.

By using the clamping device of the present invention, the workpiece 5 is firmly fixed, and will not lift up or shift during processing. At the same time, it will not cause deformation of the workpiece 5, thereby ensuring the dimensional accuracy and shape accuracy of the workpiece 5, ensuring the processing quality, and reducing the scrap rate.

According to the disclosure and teaching of the above-mentioned specification, those skilled in the art to which the present invention belongs can also make changes and modifications to the above-mentioned embodiment. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the protection scope of the claims of the present invention. In addition, although some specific terms are used in this specification, these terms are only for convenience of description and do not constitute any limitation to the present invention.

Claims (10)

1., containing the Workpiece clamping device of cam, it is characterized in that: comprise cam, handle, rocking arm block and rotating shaft;

Described handle is connected with described cam, and described handle can drive described cam to rotate;

Workpiece is positioned over the top of described cam;

Described rocking arm block is arranged at the side of described cam, and the contact aside of described rocking arm block and described cam;

Described rotating shaft is arranged on described rocking arm block, and described rocking arm block can around described axis of rotation to the top of described workpiece and by described Workpiece clamping.

2. the Workpiece clamping device containing cam according to claim 1, it is characterized in that: the connecting axle that described cam comprises cam body and is connected with described cam body, described connecting axle is positioned at the below of described cam body, the contact aside of described rocking arm block and described cam body.

3. the Workpiece clamping device containing cam according to claim 2, it is characterized in that: described handle comprises grip part and connecting portion, one end of described connecting portion is fixed on described connecting axle, and the other end of described connecting portion is connected with described grip part.

4. the Workpiece clamping device containing cam according to claim 1, it is characterized in that: described rocking arm block is set to three, and the angle between adjacent two described rocking arm blocks is 60 ° ~ 150 °.

5. the Workpiece clamping device containing cam according to claim 2, it is characterized in that: described rocking arm block comprises with the contact-segment of the contact aside of described cam body, for pushing down crimp segment and the linkage section of described workpiece, one end of described linkage section is connected with one end of described contact-segment, the other end of described linkage section is connected with one end of described crimp segment, and described rotating shaft is arranged on described linkage section.

6. the Workpiece clamping device containing cam according to claim 5, it is characterized in that: described crimp segment comprises traversing section and tilting section, one end of described traversing section is connected with the other end of described linkage section, and the other end of described traversing section is connected with one end of described tilting section.

7. the Workpiece clamping device containing cam according to claim 6, is characterized in that: the angle between described traversing section and described tilting section is 95 ° ~ 150 °, and described tilting section is downward-sloping.

8. the Workpiece clamping device containing cam according to claim 6, is characterized in that: the outer surface of the other end of described tilting section is curved.

9. the Workpiece clamping device containing cam according to claim 5, be is characterized in that: connected by segmental arc between described linkage section and described contact-segment.

10. the Workpiece clamping device containing cam according to claim 5, is characterized in that: the adjusting screw(rod) described contact-segment being also connected with the clamping force of adjustable described rocking arm block.