Oven Automatic Flanging Machine and Its Processing Method

Abstract

The present invention relates to an automatic flanging machine for an oven. The device includes a base, a lower lifting mechanism, an outer clamping mechanism, an upper pressing mechanism, an inner expansion mechanism, and an upper guiding mechanism. The lower lifting mechanism includes a servo power cylinder, a stepped cam, and a lower flanging mechanism. The inner expansion mechanism adopts a four-piece split structure and expands the inner diameter of the workpiece under the action of the cam. The outer clamping mechanism adopts a four-piece split power mechanism. The present invention effectively improves the finished product rate of the oven inner liner. The flanging machine can be used for manually placing the workpiece to be flanged, or for automatically picking and placing the oven inner liner workpiece in an automatic production line.

Description

Technical Field

[0001] The present invention relates to the field of household appliances, and more specifically to an automatic flanging machine for ovens and its processing method. Background Art

[0002] In the existing production method of oven inner liners, two components are first stamped and formed separately, and then joined and welded. In the process using this method, since there is a U-shaped bend in the single-piece component, when welding at the butted joint of the U-shaped interface, due to processing errors and structural limitations, gaps are likely to occur and effective welding cannot be achieved, seriously affecting the qualified rate of subsequent finished products. Summary of the Invention

[0003] The present invention aims to overcome the defects of the prior art and provides an automatic flanging machine for ovens and its processing method, which is an automatic composite flanging machine that can effectively improve the finished product rate of oven inner liners.

[0004] To solve the above technical problems, the present invention is implemented as follows:

[0005] An automatic flanging machine for ovens, characterized in that it includes a base, a lower lifting mechanism, an outer clamping mechanism, an upper pressing mechanism, an inner expansion mechanism, and an upper guiding mechanism;

[0006] The base includes a bottom base and an upper base located on its top;

[0007] The lower lifting mechanism includes a servo hydraulic cylinder, a stepped cam, a lower flanging mechanism, and a fixed bottom plate; the lower part of the bottom base is connected to the fixed bottom plate, the servo hydraulic cylinder is located below the fixed bottom plate, the top of its telescopic rod passes through the fixed bottom plate and is sleeved with the stepped cam, and the top of the stepped cam passes through the bottom base and a lower flanging mechanism is provided on its outer edge;

[0008] The outer clamping mechanism includes four hydraulic cylinders and four outer clamping blocks; the four hydraulic cylinders are evenly distributed around the upper part of the bottom base to limit and fix the outer ring of the workpiece at the central position, and the front parts of the telescopic rods of the four hydraulic cylinders are respectively provided with outer clamping blocks for clamping the workpiece;

[0009] The upper pressing mechanism includes two translation cylinders, two translation brackets, two pressing hydraulic cylinders, and two pressing plates; the two translation cylinders are respectively arranged on both sides of the upper part of the upper base, the two translation brackets are respectively arranged on the upper parts of the two translation cylinders, the two pressing hydraulic cylinders are respectively arranged in the two translation brackets and their inner sides are respectively connected with a pressing plate;

[0010] The inner expansion mechanism includes four expansion blocks and four guide posts; the four expansion blocks are arranged around the top of the stepped cam, and the four guide posts are respectively arranged on the upper parts of the four expansion blocks;

[0011] The upper guiding mechanism is fixed on the four guide posts for workpiece positioning.

[0012] The processing method of the described oven automatic flanging machine is characterized by including the following steps:

[0013] Step 1: The equipment is in the original position: the servo hydraulic cylinder of the lower lifting mechanism is in the retracted state, the stepped cam is in the lower limit position, the four hydraulic cylinders of the outer clamping mechanism are in the retracted state, the two translation cylinders of the upper pressing mechanism are in the retracted state, the two pressing hydraulic cylinders are in the retracted state, and the four expansion blocks are in the tightened state;

[0014] Step 2: Manually or by a manipulator, place the workpiece to be flanged along the upper guiding mechanism and place it downward;

[0015] Step 3: The two translation cylinders extend, the two pressing hydraulic cylinders extend, and the pressing plate presses the upper edge of the workpiece;

[0016] Step 4: The four hydraulic cylinders of the outer clamping mechanism extend to limit and fix the outer circle of the workpiece;

[0017] Step 5: The servo hydraulic cylinder of the lower lifting mechanism extends, pushing the stepped cam upward, and the stepped cam pushes the four expansion blocks to expand outward to complete one flanging;

[0018] Step 6: The servo hydraulic cylinder of the lower lifting mechanism continues to extend, and the lower edge of the stepped cam drives the lower flanging mechanism to continue to rise to complete the second flanging;

[0019] Step 7: Hold the pressure and delay;

[0020] Step 8: The servo hydraulic cylinder of the lower lifting mechanism retracts to the original position;

[0021] Step 9: The four expansion blocks retract;

[0022] Step 10: The two pressing hydraulic cylinders continue to extend, and the workpiece is demolded;

[0023] Step 11: The four hydraulic cylinders of the outer clamping mechanism retract to the original position;

[0024] Step 12: The two pressing hydraulic cylinders retract to the original position, and the two translation cylinders return to the original position;

[0025] Step 13: Manually or by a manipulator, take out the workpiece with flanging completed.

[0026] The beneficial effects of the present invention are: changing the forming process of the oven inner liner. When two parts are stamped and formed, the U-shaped opening is not made, and then the two parts are joined by roll welding. The special oven vertical edge machine pointed to by this application performs the U-shaped bending action integrally in sequence.

[0027] Effectively improve the finished product rate of the oven inner liner. This flanging machine can be used for manually placing the workpiece to be flanged, and can also be used for automatically picking and placing the oven inner liner workpiece in an automatic production line.

[0028] Compared with the existing conventional flanging and then combined welding process, the present invention adopts combined welding first and then integral one-time flanging, effectively avoiding the connection gap problem at the flanging position and greatly improving the product qualification rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention will be further described in detail below in conjunction with the drawings and embodiments:

[0030] Figure 1 It is a schematic diagram of the main view direction of the present invention.

[0031] Figure 2 It is a sectional view in the main view direction.

[0032] Figure 3 It is a schematic diagram of the top view direction on the bottom base.

[0033] Figure 4 It is a three-dimensional view. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] As Figures 1-4 shown: An automatic flanging machine for an oven, which includes a base, a lower lifting mechanism, an outer clamping mechanism, an upper pressing mechanism, an inner expansion mechanism, and an upper guiding mechanism;

[0035] The base includes a bottom base 110 and an upper base 111 located on its top;

[0036] The lower lifting mechanism 210 includes a servo hydraulic cylinder 211, a stepped cam 212, a lower flanging mechanism 213, and a fixed bottom plate 214; the lower part of the bottom base is connected to the fixed bottom plate, the servo hydraulic cylinder is located below the fixed bottom plate, and the top of its telescopic rod passes through the fixed bottom plate and is sleeved with the stepped cam, and the top of the stepped cam passes through the bottom base and the lower flanging mechanism is provided on its outer edge;

[0037] The outer clamping mechanism 310 includes four hydraulic cylinders 311 and four outer clamping blocks 312; the four hydraulic cylinders are evenly distributed around the upper part of the bottom base to limit and fix the outer ring of the workpiece at the central position, and the front parts of the telescopic rods of the four hydraulic cylinders are respectively provided with outer clamping blocks for clamping the workpiece;

[0038] The upper pressing mechanism 410 includes two translation cylinders 411, two translation brackets 412, two pressing hydraulic cylinders 413, and two pressing plates 414; the two translation cylinders are respectively arranged on both sides of the upper part of the upper base, the two translation brackets are respectively arranged on the upper parts of the two translation cylinders, and the two pressing hydraulic cylinders are respectively arranged in the two translation brackets and their inner sides are respectively connected to a pressing plate;

[0039] The internal expansion mechanism 510 includes four expansion blocks 511 and four guide posts 512; the four expansion blocks are arranged around the top of the stepped cam, and the four guide posts are respectively arranged on the upper parts of the four expansion blocks;

[0040] The upper guiding mechanism 610 is fixed on the four guide posts for workpiece positioning.

[0041] A processing method for an automatic flanging machine of an oven includes the following steps:

[0042] Step 1: The equipment is in the original position: the servo hydraulic cylinder of the lower lifting mechanism is in the retracted state, the stepped cam is in the lower limit position, the four hydraulic cylinders of the outer clamping mechanism are in the retracted state, the two translation cylinders of the upper pressing mechanism are in the retracted state, the two pressing hydraulic cylinders are in the retracted state, and the four expansion blocks are in the tightened state;

[0043] Step 2: Manually or by a manipulator, place the workpiece to be flanged downward along the upper guiding mechanism;

[0044] Step 3: The two translation cylinders extend, the two pressing hydraulic cylinders extend, and the pressing plate presses the upper edge of the workpiece;

[0045] Step 4: The four hydraulic cylinders of the outer clamping mechanism extend to limit and fix the outer circle of the workpiece;

[0046] Step 5: The servo hydraulic cylinder of the lower lifting mechanism extends to push the stepped cam upward, and the stepped cam pushes the four expansion blocks to expand outward to complete one flanging;

[0047] Step 6: The servo hydraulic cylinder of the lower lifting mechanism continues to extend, and the lower edge of the stepped cam drives the lower flanging mechanism to continue to move upward to complete the second flanging;

[0048] Step 7: Hold the pressure for a delay;

[0049] Step 8: The servo hydraulic cylinder of the lower lifting mechanism retracts to the original position;

[0050] Step 9: The four expansion blocks retract;

[0051] Step 10: The two pressing hydraulic cylinders continue to extend, and the workpiece is demolded;

[0052] Step 11: The four hydraulic cylinders of the outer clamping mechanism retract to the original position;

[0053] Step 12: The two pressing hydraulic cylinders retract to the original position, and the two translation cylinders return to the original position;

[0054] Step 13: Manually or by a manipulator, take out the workpiece with flanging completed.

Claims

1. A processing method for an automatic flanging machine of an oven, characterized in that: The flanging machine adopted by this method includes a base, a lower lifting mechanism, an outer clamping mechanism, an upper pressing mechanism, an inner expansion mechanism, and an upper guiding mechanism; The base includes a bottom base and an upper base located at its top; The lower lifting mechanism includes a servo hydraulic cylinder, a stepped cam, a lower flanging mechanism, and a fixed bottom plate; the lower part of the bottom base is connected to the fixed bottom plate, the servo hydraulic cylinder is located below the fixed bottom plate, the top of its telescopic rod passes through the fixed bottom plate and sleeves the stepped cam, and the top of this stepped cam passes through the bottom base and a lower flanging mechanism is provided on its outer edge; The outer clamping mechanism includes four hydraulic cylinders and four outer clamping blocks; the four hydraulic cylinders are evenly distributed around the upper part of the bottom base to limit and fix the outer ring of the workpiece at the central position, and outer clamping blocks are respectively provided at the front parts of the telescopic rods of the four hydraulic cylinders to clamp the workpiece; The upper pressing mechanism includes two translation cylinders, two translation brackets, two pressing hydraulic cylinders, and two pressing plates; the two translation cylinders are respectively arranged on both sides of the upper part of the upper base, the two translation brackets are respectively arranged on the upper parts of the two translation cylinders, the two pressing hydraulic cylinders are respectively arranged in the two translation brackets and their inner sides are respectively connected with a pressing plate; The inner expansion mechanism includes four expansion blocks and four guiding columns; the four expansion blocks are arranged around the top of the stepped cam, and the four guiding columns are respectively arranged on the upper parts of the four expansion blocks; The upper guiding mechanism is fixed on the four guiding columns for workpiece positioning; It includes the following steps: Step 1: The equipment is in the original position: the servo hydraulic cylinder of the lower lifting mechanism is in the retracted state, the stepped cam is in the lower limit position, the four hydraulic cylinders of the outer clamping mechanism are in the retracted state, the two translation cylinders of the upper pressing mechanism are in the retracted state, the two pressing hydraulic cylinders are in the retracted state, and the four expansion blocks are in the tightened state; Step 2: Manually or by a manipulator, place the workpiece to be flanged along the upper guiding mechanism downward; Step 3: The two translation cylinders extend, the two pressing hydraulic cylinders extend, and the pressing plates press the upper edge of the workpiece; Step 4: The four hydraulic cylinders of the outer clamping mechanism extend to limit and fix the outer ring of the workpiece; Step 5: The servo hydraulic cylinder of the lower lifting mechanism extends to push the stepped cam upward, and the stepped cam pushes the four expansion blocks to expand outward to complete one flanging; Step 6: The servo hydraulic cylinder of the lower lifting mechanism continues to extend, and the lower edge of the stepped cam drives the lower flanging mechanism to continue to rise to complete the second flanging; Step 7: Hold the pressure and delay; Step 8: The servo hydraulic cylinder of the lower lifting mechanism retracts and returns to its original position; Step 9: The four expansion blocks retract; Step 10: The two pressing hydraulic cylinders continue to extend, and the workpiece is demolded; Step 11: The four hydraulic cylinders of the outer clamping mechanism retract and return to their original positions; Step 12: The two pressing hydraulic cylinders retract and return to their original positions, and the two translation cylinders return to their original positions; Step 13: Manually or by a manipulator, take out the flanged workpiece.

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