Cam edge pressing mechanism

Abstract

A cam edge pressing mechanism comprises a fixing support, a cam rotating shaft, a fixing shaft, an edge pressing arm, a shifting fork, a roller, a cam and a spring supporting assembly. The two ends of the cam rotating shaft are rotationally supported by the fixing supports, the two ends of the fixing shaft are fixedly supported by the fixing supports, and the fixing shaft is located above the cam rotating shaft. The blank pressing arm is installed on the fixing shaft and can rotate around the fixing shaft, the shifting fork is installed at one end of the blank pressing arm, the roller is installed at the other end of the blank pressing arm through the roller support, the roller is rotationally supported by the roller shaft, the roller shaft is fixedly installed on the roller support, and the roller support is installed on the blank pressing arm. The cam is installed on the cam rotating shaft and rotates along with the cam rotating shaft, the cam corresponds to the idler wheel and makes contact with the idler wheel all the time, the cam rotates to enable the idler wheel to drive the blank pressing arm to do lever arc swing, and therefore the shifting fork drives the blank pressing ring assembly to do vertical linear motion so as to loosen or press a stretched product. The cam edge pressing mechanism is compact in structure and beneficial to organized production and installation.

Description

Technical Field

[0001] The invention relates to a side pressing cam adjusting mechanism of a stretching machine. Background Art

[0002] The edge clamping mechanism is a mechanical device widely used in metal sheet processing, stretch forming and other fields. Its main function is to control the deformation of the material edge by applying pressure, preventing the edge of the sheet from wrinkling or warping due to uneven force, thereby ensuring processing accuracy and product quality.

[0003] The installation of the existing edge holding mechanism is divided into two parts. One part includes the edge holding arm, fork, cam, etc. installed on the upper mold. The fork is connected to the edge holding ring assembly. When the edge holding arm swings, it drives the edge holding ring assembly to move up and down to loosen or tighten the stretched product. The other part of the spring support mechanism is installed in the lower mold. Such separate installation is not conducive to component-based production. Moreover, the overall size of the existing mechanism is very large and occupies a large space. The spring of the spring support mechanism is arranged at the end of the edge holding arm, so the edge holding arm is in a cantilever state. In addition, the spring has no support guide such as a guide rod. When the edge holding arm swings, the spring is easy to bend. Over time, the spring cannot play a good supporting role for the edge holding arm, and even affects the edge holding accuracy. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the above-mentioned defects of the prior art and provide a cam edge pressing mechanism with a compact structure and easy installation.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: A cam pressing mechanism comprises a fixed bracket, a cam shaft, a fixed shaft, a pressing arm, a shift fork, a roller, a cam, and a spring support assembly; both ends of the cam shaft are rotatably supported by the fixed bracket, and both ends of the fixed shaft are fixedly supported by the fixed bracket and are located above the cam shaft; the pressing arm is installed on the fixed shaft and can rotate around the fixed shaft, one end of the pressing arm is installed with a shift fork, and the other end is installed with a roller through a roller bracket, the roller is rotatably supported by the roller shaft, the roller shaft is fixedly installed on the roller bracket, and the roller bracket is installed on the pressing arm; the cam is installed on the cam shaft and rotates with the cam shaft, the cam corresponds to the roller and is always in contact with the roller, and the rotation of the cam causes the roller to drive the pressing arm to swing in a lever arc, thereby causing the shift fork to drive the pressing ring assembly to move up and down linearly to loosen or tighten the stretched product.

[0006] Preferably, the cams are multiple according to the requirements of the stretching stations, and each cam has a different shape to meet the requirements of varying stretching heights at different stations.

[0007] Better yet, a spring support assembly is provided, which includes an upper sleeve, a lower sleeve and a spring. The upper sleeve and the lower sleeve are concentric, one end of the lower sleeve is located inside or outside the upper sleeve, and the spring is located inside the upper sleeve and the lower sleeve, with its upper end in contact with the inner end surface of the upper sleeve and its lower end in contact with the inner end surface of the lower sleeve. The upper end of the upper sleeve is hinged to the pressure arm, and the lower end of the lower sleeve is hinged to the fixed seat. The fixed seat can be integrated with the fixed bracket, or it can be installed on the lower mold or the base. The spring support assembly can support the pressure arm in a follow-up manner, and the spring will swing and extend and retract with the swing of the pressure arm to play a supporting role.

[0008] Preferably, the upper end of the upper sleeve is located in the middle of the total length between the pressure arm and the shift fork, which provides a better supporting effect and improves the edge pressing accuracy.

[0009] Preferably, a guide column is provided in the upper sleeve or the lower sleeve, which is integral with and concentric with the upper sleeve or the lower sleeve, and the spring is sleeved on the guide column. The guide column can guide the spring to linearly expand and contract to prevent it from bending randomly.

[0010] Better yet, the upper sleeve is connected to the pressure arm via a bolt, which is threaded onto the upper sleeve. One end of the bolt is screwed into the upper sleeve, and the other end is hinged to the pressure arm. The upper sleeve or the bolt is rotated to adjust its initial position, thereby adjusting the spring deformation.

[0011] Better yet, the lower sleeve is connected to the fixing seat by another bolt, the other bolt is threadedly connected to the lower sleeve, one end of the other bolt is screwed into the lower sleeve, and the other end is hinged to the fixing seat, and the lower sleeve or the other bolt is rotated to adjust its initial position, thereby adjusting the spring deformation.

[0012] Better yet, a pressure arm adjustment mechanism is also provided, which includes an adjusting bolt, which is installed at the end of the pressure arm, or installed on the pressure arm through an adjustment plate. The adjusting bolt is threadedly connected to the roller bracket, and the roller bracket is driven up and down by screwing the bolt to change the height position of the roller, thereby adjusting the height position of the pressure ring assembly to adapt to changes in the wall thickness of the stretched product.

[0013] Compared with the prior art, the present invention has the advantages that the cam edge pressing mechanism is an integral whole, so its structure is compact and is convenient for organizing production and installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The figure is a schematic diagram of the three-dimensional structure of a cam edge pressing mechanism according to an embodiment of the present invention.

[0015] Figure 2 This is a front structural schematic diagram of a cam edge pressing mechanism according to an embodiment of the present invention.

[0016] Figure 3 for Figure 2 Section view at AA in the middle.

[0017] Figure 4 This is a partial cross-sectional view of a spring support assembly of a cam pressure mechanism according to an embodiment of the present invention.

[0018] Figure 5 The figure is a side sectional view of a cam edge pressing mechanism according to another embodiment of the present invention.

[0019] Figure 6 This is a partial cross-sectional view of a spring support assembly of a cam pressure mechanism according to another embodiment of the present invention. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to the accompanying drawings and examples.

[0021] like Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, a cam edge pressing mechanism includes a fixed bracket 1, a cam shaft 2, a fixed shaft 3, an edge pressing arm 4, a shift fork 5, a roller 6, a cam 7, and a spring support assembly 8.

[0022] Both ends of the cam shaft 2 are rotatably supported by the fixed bracket 1 , and both ends of the fixed shaft 3 are fixedly supported by the fixed bracket 1 and are located above the cam shaft 2 .

[0023] The edge pressing arm 4 is installed on the fixed shaft 3 and can rotate around the fixed shaft 3. A fork 5 is installed on one end of the arm, and a roller 6 is installed on the other end through a roller bracket 601. The roller 6 is rotatably supported by a roller shaft 602. The roller shaft 602 is fixedly installed on the roller bracket 601, and the roller bracket 601 is installed on the edge pressing arm 4.

[0024] The cam 7 is installed on the cam shaft 2 and rotates with the cam shaft 2. There can be multiple cams 7 according to the requirements of the stretching station. The shape of each cam 7 is different to meet the requirements of the stretching height changes at different stations. The cam 7 corresponds to the roller 6 one by one and is always in contact with it.

[0025] The spring support assembly 8 includes an upper sleeve 801, a lower sleeve 802 and a spring 803. The upper sleeve 801 and the lower sleeve 802 are concentric. One end of the lower sleeve 802 is located in the upper sleeve 801. A guide column 8022 is provided in the lower sleeve 802, which is integral with and concentric with the upper sleeve 801. The upper end of the upper sleeve 801 is hinged to the pressure arm 4 and is basically located in the middle position of the pressure arm 4 and the fork 5, which has a better supporting effect on the pressure arm. The lower end of the lower sleeve 802 is hinged to the fixed seat 804.

[0026] The spring 803 is located within the upper sleeve 801 and the lower sleeve 802 and is sleeved on the outside of the guide post 8022. Its upper end contacts the inner end surface 8011 of the upper sleeve 801, and its lower end contacts the inner end surface 8021 of the lower sleeve 802. The spring will swing and expand and contract with the swing of the edge clamp arm 4, providing support. In addition, since the guide post 8022 is provided in the lower sleeve 802, the guide post 8022 can guide the linear expansion and contraction of the spring 803, preventing it from bending randomly.

[0027] The spring support assembly 8, the pressure arm 4, the shift fork 5, the cam 7 and the roller 6 form a group. In this embodiment, there are 5 groups, which are arranged in parallel to synchronously complete the edge pressing action.

[0028] The entire edge pressing mechanism mentioned above is a whole, which is connected to the stretching and forming equipment after assembly. The fixed bracket 1 is installed on the lower mold of the stretching and forming equipment (not shown in the figure), and can also be installed on the base (not shown in the figure) on which the lower mold is installed. The fixed seat 804 can be integrated with the fixed bracket 1, and can also be installed on the lower mold or the base. Therefore, it can facilitate the organization of production and the structure is also very compact.

[0029] During operation, the cam shaft 2 rotates, driving the cam 7 to rotate, causing the roller 6 to drive the pressure arm 4 to swing in a lever arc, thereby causing the fork 5 to drive the pressure ring assembly to move up and down in a straight line to loosen or tighten the stretched product.

[0030] Since the wall thickness of the stretched product will change, the height position of the pressure ring assembly also needs to be changed, so a pressure arm adjustment mechanism 9 is also provided. The pressure arm adjustment mechanism 9 includes an adjusting bolt 901. The adjusting bolt 901 is installed at the end of the pressure arm 4, or is installed on the pressure arm 4 through an adjustment plate 902. The adjusting bolt 901 is threadedly connected to the roller bracket 601. By screwing the bolt 901, the roller bracket 601 is driven up and down to change the height position of the roller 6, thereby adjusting the height position of the pressure ring assembly.

[0031] At this time, the mounting hole connecting the roller bracket 601 and the pressure arm 4 is a long waist-shaped hole. When adjusting, you only need to loosen the mounting screw a little, and the roller bracket 601 will move up or down along the mounting screw. After the position is adjusted, tighten the mounting screw.

[0032] like Figure 5 、 6 As shown, it is another embodiment of the cam pressing mechanism, which changes the connection relationship between the lower sleeve 802 and the fixed seat 804. The lower sleeve 802 is hinged to the fixed seat 804 through a bolt 805. A threaded hole 8023 is provided at the bottom of the lower sleeve 802. One end of the bolt 805 is screwed into the threaded hole 8023 and enters the lower sleeve 802, and the other end is hinged to the fixed seat 804.

[0033] Since the lower sleeve 802 is threadedly connected to the bolt 805, the lower sleeve 802 or the bolt 805 can be rotated according to actual needs to adjust the initial position of the lower sleeve 802, thereby adjusting the deformation of the spring.

[0034] Similarly, the connection relationship between the upper sleeve and the pressure arm can be changed to adjust the spring deformation.

Claims

1. A cam edge pressing mechanism, characterized by: It includes a fixed bracket, a cam shaft, a fixed shaft, a pressure arm, a fork, a roller, a cam, and a spring support assembly; the two ends of the cam shaft are rotatably supported by the fixed bracket, and the two ends of the fixed shaft are fixedly supported by the fixed bracket and are located above the cam shaft; the pressure arm is installed on the fixed shaft and can rotate around the fixed shaft, one end of which is installed with a fork, and the other end is installed with a roller through a roller bracket, the roller is rotatably supported by the roller shaft, the roller shaft is fixedly installed on the roller bracket, and the roller bracket is installed on the pressure arm; the cam is installed on the cam shaft and rotates with the cam shaft, the cam corresponds to the roller and is always in contact with the roller, and the rotation of the cam causes the roller to drive the pressure arm to swing in a lever arc, thereby causing the fork to drive the pressure ring assembly to move up and down linearly to loosen or tighten the stretched product.

2. The cam edge pressing mechanism according to claim 1, wherein: The cam has a plurality of different shapes.

3. The cam edge pressing mechanism according to claim 1, wherein: A spring support assembly is also provided, which includes an upper sleeve, a lower sleeve and a spring. The upper sleeve and the lower sleeve are concentric, and one end of the lower sleeve is located inside or outside the upper sleeve. The spring is located inside the upper sleeve and the lower sleeve, and its upper end contacts the inner end surface of the upper sleeve, and the lower end contacts the inner end surface of the lower sleeve. The upper end of the upper sleeve is hinged to the pressure arm, and the lower end of the lower sleeve is hinged to the fixed seat. The fixed seat can be integrated with the fixed bracket, or it can be installed on the lower mold or the base. The spring support assembly can support the pressure arm in a follow-up manner, and the spring will swing and extend and retract with the swing of the pressure arm to play a supporting role.

4. The cam edge pressing mechanism according to claim 3, wherein: The upper end of the upper sleeve is located in the middle of the total length between the pressure arm and the shift fork.

5. The cam edge pressing mechanism according to claim 3, wherein: A guide column which is integral with and concentric with the upper sleeve or the lower sleeve is arranged in the upper sleeve or the lower sleeve, and the spring is sleeved on the guide column.

6. The cam edge pressing mechanism according to claim 3, wherein: The upper sleeve is connected to the pressure arm through a bolt, and the bolt is threadedly connected to the upper sleeve. One end of the bolt is screwed into the upper sleeve and the other end is hinged to the pressure arm. The upper sleeve or the bolt is rotated to adjust its initial position, thereby adjusting the spring deformation.

7. The cam edge pressing mechanism according to claim 3, wherein: The lower sleeve is connected to the fixing seat by another bolt, and the other bolt is threadedly connected to the lower sleeve. One end of the other bolt is screwed into the lower sleeve, and the other end is hinged to the fixing seat. The lower sleeve or the other bolt is rotated to adjust its initial position, thereby adjusting the deformation of the spring.

8. The cam edge pressing mechanism according to claim 1, wherein: A pressure arm adjustment mechanism is also provided, which includes an adjusting bolt. The adjusting bolt is installed at the end of the pressure arm, or is installed on the pressure arm through an adjustment plate. The adjusting bolt is threadedly connected to the roller bracket, and the roller bracket is driven up and down by screwing the bolt to change the height position of the roller.

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