Displacement detection structure for main cylinder of double-acting seal head press

Abstract

A double-acting seal head press main cylinder displacement detection structure comprises a double-acting seal head press, the double-acting seal head press comprises an inner main cylinder and an outer cylinder, the outer cylinder is distributed on the periphery of the inner main cylinder, an outer pressing plate is movably installed on a guide column, a piston rod of the inner main cylinder is connected with an inner pressing head, and an annular guide rail is fixedly arranged on the periphery of the inner pressing head. A sliding block is movably installed on the annular guide rail, a stay wire displacement sensor is fixedly arranged on the inner main cylinder, the sliding block is located under the stay wire displacement sensor, and a stay wire of the stay wire displacement sensor is vertically downwards connected with the sliding block. When the inner pressure head rotates and the sliding block deviates from the position under the stay wire displacement sensor to cause the stay wire to be inclined to the vertical direction, the sliding block can rapidly move along the annular guide rail and reset to the position under the stay wire displacement sensor along with acting force generated by downward movement of the inner pressure head on the stay wire. The stay wire of the stay wire displacement sensor is always kept in the vertical direction, the accuracy of displacement measurement is ensured, and the product percent of pass is improved.

Description

Technical Field

[0001] The present invention relates to the field of machinery, in particular to hydraulic forming equipment, and more particularly to a displacement detection structure for the main cylinder of a double-acting head press. Background Art

[0002] A double-acting head press is a type of hydraulic forming equipment. The double-acting head press includes an outer pressing plate and an inner pressing head. The outer pressing plate is located on the outer periphery of the inner pressing head. The inner piston rods of the main cylinder and the outer cylinder are respectively connected to the outer pressing plate and the inner pressing head. The outer pressing plate is used to fix the edge of the sheet, and the inner pressing head provides the main forming force. The displacement monitoring of the inner pressing head is a key link to ensure the precision of the pressing process and the quality of the product. In the prior art, a wire-drawing displacement sensor is used to measure the displacement of the inner pressing head. The wire-drawing displacement sensor converts the displacement signal into an electrical signal and outputs it. The wire-drawing displacement sensor is fixed on the press, and its wire is connected to the lower end of the inner pressing head. However, during the actual pressing process, due to the lack of a guiding and aligning mechanism for the inner pressing head, the inner pressing head will rotate, causing the wire to change from being parallel to the vertical direction to being inclined to the vertical direction, resulting in inaccurate displacement measurement and thus an increase in the unqualified rate of the product. Summary of the Invention

[0003] The purpose of the present invention is to provide a displacement detection structure for the main cylinder of a double-acting head press, and the displacement detection structure for the main cylinder of the double-acting head press is to solve the technical problem that the rotation of the inner pressing head in the prior art leads to inaccurate displacement measurement.

[0004] A displacement detection structure for the main cylinder of a double-acting head press according to the present invention includes a double-acting head press. The double-acting head press includes a base. Four guiding columns are fixedly arranged on the base. A fixed seat is fixedly arranged on the upper sides of the four guiding columns. An inner main cylinder and more than two outer cylinders are fixedly arranged on the lower side of the fixed seat. The outer cylinders are distributed on the outer periphery of the inner main cylinder. An outer pressing plate is movably installed on the guiding columns. The piston rod of the outer cylinder is fixedly connected to the outer pressing plate. A through hole is arranged in the center of the outer pressing plate. The piston rod of the inner main cylinder passes downward through the through hole and is fixedly connected to an inner pressing head. An annular guide rail is fixedly arranged on the outer periphery of the inner pressing head. A slider is movably installed on the annular guide rail. A wire-drawing displacement sensor is fixedly arranged on the inner main cylinder. The slider is located directly below the wire-drawing displacement sensor. The wire of the wire-drawing displacement sensor is vertically downward and connected to the slider.

[0005] Further, a T-shaped sliding groove is arranged in the annular guide rail. A T-shaped limiting structure matching the T-shaped sliding groove is arranged at the bottom of the slider. Rollers are respectively arranged on both sides of the T-shaped limiting structure.

[0006] Compared with the prior art, the effect of the present invention is positive and obvious. When the inner pressure head rotates, the slider deviates from directly below the wire-pulling displacement sensor, causing the wire to tilt in the vertical direction. As the inner pressure head moves downward and generates a force on the wire, the slider can quickly move along the annular guide rail and reset to directly below the wire-pulling displacement sensor, ensuring that the wire of the wire-pulling displacement sensor always remains in the vertical direction, guaranteeing the accuracy of displacement measurement and improving the product qualification rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 is a front view schematic diagram of a displacement detection structure for the main cylinder of a double-acting head press of the present invention.

[0008] Figure 2 is Figure 1 a partial enlarged schematic diagram of...

[0009] Figure 3 is a top view schematic diagram of the annular guide rail and the slider in a displacement detection structure for the main cylinder of a double-acting head press of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0010] The present invention will be further described below in conjunction with embodiments. However, the present invention is not limited to these embodiments. Any similar changes made using the present invention should be included in the protection scope of the present invention. The use of directions such as up, down, front, back, left, right, middle, inside, and outside in the present invention is only for the convenience of clear description and does not limit the technical solutions of the present invention.

[0011] As Figures 1-3 shown, a displacement detection structure for the main cylinder of a double-acting head press of the present invention includes a double-acting head press. The double-acting head press includes a base 1. Four guide columns 2 are fixedly arranged on the base 1. A fixed seat 3 is fixedly arranged on the upper sides of the four guide columns 2. A main inner cylinder 4 and more than two outer cylinders 5 are fixedly arranged on the lower side of the fixed seat 3. The outer cylinders 5 are distributed on the outer periphery of the main inner cylinder 4. An outer pressure plate 6 is movably installed on the guide columns 2. The piston rod of the outer cylinder 5 is fixedly connected to the outer pressure plate 6. A through hole is provided in the center of the outer pressure plate 6. The piston rod of the main inner cylinder 4 passes downward through the through hole and is fixedly connected to an inner pressure head 7. An annular guide rail 8 is fixedly arranged on the outer periphery of the inner pressure head 7. A slider 9 is movably installed on the annular guide rail 8. A wire-pulling displacement sensor 10 is fixedly arranged on the main inner cylinder 4. The slider 9 is located directly below the wire-pulling displacement sensor 10. The wire 13 of the wire-pulling displacement sensor 10 is vertically downward and connected to the slider 9.

[0012] Furthermore, a T-shaped chute 11 is provided in the annular guide rail 8. A T-shaped limiting structure 12 that cooperates with the T-shaped chute 11 is provided at the bottom of the slider 9. Rollers 14 are respectively arranged on both sides of the T-shaped limiting structure 12.

[0013] Specifically, for the double-acting head press, inner main cylinder 4, outer cylinder 5, outer pressure plate 6, inner pressure head 7, and wire displacement sensor 10 in the present invention, the specific structures, principles, and other aspects not elaborated in detail all adopt well-known solutions in the prior art, which are already understood by those skilled in the art and will not be elaborated herein.

[0014] When the double-acting head press of the present invention is in use, the piston rod of the outer cylinder 5 drives the outer pressure plate 6 to move downward to fix the edge of the plate. Then, the piston rod of the inner main cylinder 4 drives the inner pressure head 7 to move downward to provide the main forming force. During the working process, when the inner pressure head 7 rotates on its own and the slider 9 deviates from directly below the wire displacement sensor 10, causing the wire 13 to be inclined with respect to the vertical direction, as the inner pressure head 7 moves downward and generates a force on the wire 13, the slider 9 can quickly move along the annular guide rail 8 and reset to directly below the wire displacement sensor 10, ensuring that the wire 13 of the wire displacement sensor 10 always remains in the vertical direction, guaranteeing the accuracy of displacement measurement and improving the product qualification rate.

Claims

1. A double-acting head press main cylinder displacement detection structure, characterized in that: It includes a double-acting head press, which includes a base, four guide columns are fixedly arranged on the base, a fixed seat is fixedly arranged on the upper side of the four guide columns, an inner master cylinder and more than two outer cylinders are fixedly arranged on the lower side of the fixed seat, the outer cylinders are distributed on the outer periphery of the inner master cylinder, an outer pressure plate is movably installed on the guide columns, the piston rod of the outer cylinder is fixedly connected to the outer pressure plate, a through hole is arranged at the center of the outer pressure plate, the piston rod of the inner master cylinder passes downward through the through hole and is fixedly connected to an inner pressure head, an annular guide rail is fixedly arranged on the outer periphery of the inner pressure head, a slider is movably installed on the annular guide rail, a pull wire displacement sensor is fixedly arranged on the inner master cylinder, the slider is located directly below the pull wire displacement sensor, and the pull wire of the pull wire displacement sensor is vertically downwardly connected to the slider.

2. A double-acting head press main cylinder displacement detection structure according to claim 1, characterized in that: The annular guide rail is provided with a T-shaped slide groove, the bottom of the slide block is provided with a T-shaped limit structure matched with the T-shaped slide groove, and rollers are respectively provided on both sides of the T-shaped limit structure.

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