A multi-cylinder linkage hydraulic tool and its use method

Abstract

The present invention discloses a multi-cylinder linkage coordinated hydraulic tooling and a method for using the same. The hydraulic tooling comprises a tooling base, a first hydraulic cylinder arranged on the tooling base, and a second hydraulic cylinder, a third hydraulic cylinder, a fourth hydraulic cylinder, a fifth hydraulic cylinder, a sixth hydraulic cylinder, and a seventh hydraulic cylinder arranged around the first hydraulic cylinder; the first hydraulic cylinder has a claw piece for expanding the inner wall of a workpiece, the second hydraulic cylinder and the third hydraulic cylinder are arranged oppositely and used to support the workpiece, the fourth hydraulic cylinder pushes the workpiece in the first direction, and the fifth hydraulic cylinder pushes the workpiece in the second direction until the workpiece reaches the reference position, the sixth hydraulic cylinder and the seventh hydraulic cylinder are arranged oppositely, the sixth hydraulic cylinder is a support cylinder for supporting the workpiece, and the seventh hydraulic cylinder is used to press the workpiece sideways. The hydraulic tooling of the present invention is used to fix and clamp the volute of a turbocharger, is easy to clamp, the positioning reference meets the requirements of the drawings, and has strong stability.

Description

Technical Field

[0001] The invention relates to the field of hydraulic tooling, and in particular to a multi-cylinder linkage coordinated hydraulic tooling and a use method thereof. Background Art

[0002] Turbocharging is a technology that uses the exhaust gas generated by the operation of an internal combustion engine to drive an air compressor. It is commonly used in automobile engines. Turbochargers can increase the horsepower output of internal combustion engines. The design of the turbocharger's volute is crucial. It is used to accommodate the turbine and withstand the impact of the airflow, and to make the airflow flow and distribute reasonably to improve the efficiency of the turbine. That is, there is room for continuous optimization of the volute while keeping its general shape unchanged.

[0003] At present, the volute used in turbochargers is difficult to clamp and fix during processing, which makes processing more troublesome. When the blank needs to be positioned according to the customer's drawing requirements, manual clamps are not easy to meet the drawing requirements, the dimensions are unstable, and the efficiency of manual clamps is low. At present, there is a lack of hydraulic tooling suitable for volutes that can meet the drawing positioning requirements and is easy to clamp. Summary of the invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides a multi-cylinder linkage hydraulic tooling and a method of using the same. The technical solution is as follows:

[0005] On the one hand, the present invention provides a multi-cylinder linkage hydraulic tool, comprising a tool base and a first hydraulic cylinder, a second hydraulic cylinder, a third hydraulic cylinder, a fourth hydraulic cylinder, a fifth hydraulic cylinder, a sixth hydraulic cylinder and a seventh hydraulic cylinder arranged on the tool base;

[0006] The first hydraulic cylinder has a claw piece for expanding the inner wall of the workpiece, and the second hydraulic cylinder, the third hydraulic cylinder, the fourth hydraulic cylinder, the fifth hydraulic cylinder, the sixth hydraulic cylinder and the seventh hydraulic cylinder are arranged around the first hydraulic cylinder, wherein the second hydraulic cylinder is arranged opposite to the third hydraulic cylinder and is used to support the workpiece, the fourth hydraulic cylinder pushes the workpiece in the first direction, and the fifth hydraulic cylinder pushes the workpiece in the second direction until the workpiece reaches the reference position, the sixth hydraulic cylinder is arranged opposite to the seventh hydraulic cylinder, the sixth hydraulic cylinder is a supporting cylinder for supporting the workpiece, and the seventh hydraulic cylinder is used to press the workpiece laterally.

[0007] Furthermore, the fourth hydraulic cylinder and the fifth hydraulic cylinder are single-acting hydraulic cylinders.

[0008] Furthermore, the second hydraulic cylinder, the third hydraulic cylinder and the seventh hydraulic cylinder are 25 thin cylinders.

[0009] Further, the first hydraulic cylinder includes a built-in chuck, the claw pieces are arranged on the built-in chuck, and the number of the claw pieces is three.

[0010] Furthermore, a floating V-block for pressing the workpiece is provided on the front end of the seventh hydraulic cylinder close to the workpiece.

[0011] Furthermore, a certain number of sequence valves, pressure reducing valves and flow valves are provided on the hydraulic circuit corresponding to the hydraulic tooling, wherein the sequence valve is used to control the order of action of the seven hydraulic cylinders, the flow valve is used to control the speed of action of the hydraulic cylinders, and the number of the pressure reducing valves is two, and the two pressure reducing valves are respectively used to control the clamping force of the claw of the first hydraulic cylinder and the jacking force of the seventh hydraulic cylinder.

[0012] Furthermore, the number of the sequence valves is three, and the three sequence valves control the first hydraulic cylinder, the sixth hydraulic cylinder, and the seventh hydraulic cylinder to act in sequence.

[0013] Furthermore, the number of the flow valves is six, and the flow valves correspond one-to-one to the first hydraulic cylinder, the second hydraulic cylinder, the third hydraulic cylinder, the fourth hydraulic cylinder, the fifth hydraulic cylinder, and the seventh hydraulic cylinder. Under the control of the flow valves, the second hydraulic cylinder, the third hydraulic cylinder, the fourth hydraulic cylinder, and the fifth hydraulic cylinder act synchronously.

[0014] On the other hand, the present invention provides a method for using the hydraulic tooling based on the above-mentioned multi-cylinder linkage, comprising:

[0015] The first hydraulic cylinder is actuated so that the claw of the first hydraulic cylinder expands and supports the inner wall of the workpiece;

[0016] The second hydraulic cylinder, the third hydraulic cylinder, the fourth hydraulic cylinder, and the fifth hydraulic cylinder act synchronously, wherein the second hydraulic cylinder and the third hydraulic cylinder support the workpiece, the fourth hydraulic cylinder pushes the workpiece to the side support point, and the fifth hydraulic cylinder pushes the workpiece to the flow channel support point;

[0017] The sixth hydraulic cylinder is actuated to support the bottom of the workpiece;

[0018] The seventh hydraulic cylinder is actuated to press the side of the workpiece to complete the positioning and clamping of the workpiece.

[0019] Furthermore, the opening and closing methods of the sequence valve, pressure reducing valve and flow valve are as follows:

[0020] Open the first pressure reducing valve to open the claw of the first hydraulic cylinder, then open the first sequence valve, and adjust the first flow valve to adjust the tightening force of the claw;

[0021] Adjust the second flow valve, the third flow valve, the fourth flow valve, and the fifth flow valve to adjust the second hydraulic cylinder, the third hydraulic cylinder, the fourth hydraulic cylinder, and the fifth hydraulic cylinder to act synchronously;

[0022] Open the second sequence valve to control the sixth hydraulic cylinder to start;

[0023] Open the second pressure reducing valve to make the floating V-block of the seventh hydraulic cylinder push the side of the workpiece, then open the third sequence valve and adjust the sixth flow valve to adjust the pushing force of the floating V-block.

[0024] The beneficial effects brought by the technical solution provided by the present invention are as follows:

[0025] 1) The hydraulic tooling adopts multi-cylinder linkage, which is convenient for clamping and operation;

[0026] 2) Multiple hydraulic cylinders are distributed at different angles, which can meet the positioning requirements of the drawings and have strong adaptability;

[0027] 3) The clamping efficiency and stability of hydraulic tooling are high. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 It is a three-dimensional diagram of a hydraulic tooling with multiple cylinders in linkage provided by an embodiment of the present invention;

[0030] Figure 2 It is a top view of a hydraulic tooling with multiple cylinders in linkage provided by an embodiment of the present invention;

[0031] Figure 3 It is a side view of a hydraulic tooling with multiple cylinders in linkage provided by an embodiment of the present invention;

[0032] Figure 4 It is a cross-sectional drawing of the volute to be clamped;

[0033] Figure 5 It is a side view drawing of the volute to be clamped.

[0034] Among them, the figure marks include: 1-first hydraulic cylinder, 11-claw, 2-second hydraulic cylinder, 3-third hydraulic cylinder, 4-fourth hydraulic cylinder, 5-fifth hydraulic cylinder, 6-sixth hydraulic cylinder, 7-seventh hydraulic cylinder, 71-floating V-block, 8-tooling base, 9-hook. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the scheme of the present invention, and to more clearly understand the purpose, technical scheme and advantages of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described below in combination with specific embodiments and with reference to the accompanying drawings. It should be noted that the terms "first", "second" and the like in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described here can be implemented in an order other than those illustrated or described here. In addition, the implementation methods not illustrated or described in the drawings are forms known to ordinary technicians in the relevant technical field. Obviously, the described embodiments are only embodiments of a part of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the field without making creative work should belong to the scope of protection of the present invention. In addition, the terms "including" and "having" in the specification and claims of the present invention and any of their variations are intended to cover non-exclusive inclusions.

[0036] In one embodiment of the present invention, a multi-cylinder linkage hydraulic tool is provided for positioning and clamping a turbocharger volute, see Figure 1-3 The multi-cylinder linkage hydraulic tooling includes a tooling base 8 and a first hydraulic cylinder 1, a second hydraulic cylinder 2, a third hydraulic cylinder 3, a fourth hydraulic cylinder 4, a fifth hydraulic cylinder 5, a sixth hydraulic cylinder 6 and a seventh hydraulic cylinder 7 arranged on the tooling base 8; Figure 1 It can be seen that the second hydraulic cylinder 2, the third hydraulic cylinder 3, the fourth hydraulic cylinder 4, the fifth hydraulic cylinder 5, the sixth hydraulic cylinder 6 and the seventh hydraulic cylinder 7 are arranged around the first hydraulic cylinder 1;

[0037] Among them, the first hydraulic cylinder 1 has a claw piece 11 for expanding the inner wall of the workpiece (volute), the second hydraulic cylinder 2 and the third hydraulic cylinder 3 are arranged opposite to each other and are used to support the volute, the fourth hydraulic cylinder 4 pushes the workpiece to the side support point in the first direction, and the fifth hydraulic cylinder 5 pushes the workpiece to the flow channel support point in the second direction, the sixth hydraulic cylinder 6 and the seventh hydraulic cylinder 7 are arranged opposite to each other, the sixth hydraulic cylinder 6 is preferably a support cylinder to support the volute (increase the rigidity of the volute), and the seventh hydraulic cylinder 7 is used to press the volute laterally. Among them, the fourth hydraulic cylinder 4 is specifically used to push the hook 9, and then the hook 9 pushes the volute, and the hook 9 is a lever setting, see Figure 3 .

[0038] like Figure 1 and Figure 2As shown, the first hydraulic cylinder 1 includes a built-in chuck, and the claw piece 11 is arranged on the built-in chuck (the main centering adopts a domestic φ160 non-standard hydraulic built-in chuck to reduce the tooling height), the number of the claw pieces 11 is three and preferably an integral type (the three claw pieces 11 are partially connected as a whole, but it does not affect the expansion of the three claw pieces 11 away from the center). The effect of the integral type is that the three claw pieces 11 have good consistency and high strength.

[0039] Turbocharger volute drawing Figure 4 and Figure 5 As shown, F, G, and Z are common positioning marks of the turbocharger volute drawing (conventional marks used by draftsmen in this field), wherein Z and Z3 jointly determine a plane (limiting 3 degrees of freedom), F determines a circle (limiting 2 degrees of freedom), and G determines circumferential anti-rotation (limiting 1 degree of freedom). The actual positioning of the illustrated volute on the hydraulic tooling of the present invention is as follows: the center of F is sleeved outside the claw piece 11 of the first hydraulic cylinder 1 of the hydraulic tooling, and the cylinder 1 drives the three claw pieces 11, which are supported on F to determine the center. The outer edges of two of the three claw pieces 11 have protruding blocks (not shown), and these two protruding blocks are connected to the hydraulic tooling of the present invention. Figure 5 Point Z3 in the figure forms a plane, and cylinders 2, 3, and 5 act to make the workpiece fit with the positioning reference. On the other hand, the fourth hydraulic cylinder 4 pushes the hook 9, and the hook 9 makes the workpiece positioning point fit with point G to limit its turning. Then the sixth hydraulic cylinder 6 acts, and finally the seventh hydraulic cylinder 7 acts (Note: the first hydraulic cylinder 1 acts first, and then the second hydraulic cylinder 2, the third hydraulic cylinder 3, the fourth hydraulic cylinder 4, and the fifth hydraulic cylinder 5 act almost at the same time, followed by the sixth hydraulic cylinder 6, and finally the seventh hydraulic cylinder 7 acts), and then the volute is fixed and clamped on the hydraulic tooling.

[0040] In an embodiment of the present invention, the fourth hydraulic cylinder 4 and the fifth hydraulic cylinder 5 are single-acting hydraulic cylinders; the second hydraulic cylinder 2, the third hydraulic cylinder 3 and the seventh hydraulic cylinder 7 are 25 thin cylinders (a type of thin cylinder model commonly used in this field).

[0041] like Figure 1 and Figure 2 As shown, the seventh hydraulic cylinder 7 is provided with a floating V-block 71 for clamping the workpiece at the front end close to the workpiece, which can automatically adapt to the difference in blank size within a certain degree.

[0042] A certain number of sequence valves, pressure reducing valves and flow valves (not shown) are provided on the hydraulic circuit corresponding to the above-mentioned hydraulic tooling, wherein the sequence valve is used to control the order of action of the seven hydraulic cylinders, the flow valve is used to control the speed of action of the hydraulic cylinders, and the number of the pressure reducing valves is two, and the two pressure reducing valves are respectively used to control the clamping force of the claw 11 of the first hydraulic cylinder 1 and the jacking force of the seventh hydraulic cylinder 7.

[0043] In a preferred embodiment of the present invention, the number of the sequence valves is three, and the three sequence valves control the first hydraulic cylinder 1, the sixth hydraulic cylinder 6, and the seventh hydraulic cylinder 7 to act in sequence; the number of the flow valves is six, and the flow valves correspond to the first hydraulic cylinder 1, the second hydraulic cylinder 2, the third hydraulic cylinder 3, the fourth hydraulic cylinder 4, the fifth hydraulic cylinder 5, and the seventh hydraulic cylinder 7 one by one. Under the control of the flow valves, the second hydraulic cylinder 2, the third hydraulic cylinder 3, the fourth hydraulic cylinder 4, and the fifth hydraulic cylinder 5 act synchronously, and the specific control steps are as follows:

[0044] Open the first pressure reducing valve to open the claws of the first hydraulic cylinder, then open the first sequence valve, and adjust the first flow valve to adjust the clamping force of the claws to clamp the inner wall of the workpiece;

[0045] The second flow valve, the third flow valve, the fourth flow valve, and the fifth flow valve are adjusted to adjust the second hydraulic cylinder, the third hydraulic cylinder, the fourth hydraulic cylinder, and the fifth hydraulic cylinder to move synchronously to ensure that the positioning point is tightly in place, wherein the second hydraulic cylinder and the third hydraulic cylinder support the workpiece, the fourth hydraulic cylinder pushes the workpiece to the side support point, and the fifth hydraulic cylinder pushes the workpiece to the flow channel support point. The above synchronous action is intended to express that the actions of the four hydraulic cylinders are not in order;

[0046] Open the second sequence valve to control the sixth hydraulic cylinder to start, so as to support the bottom of the workpiece;

[0047] Open the second pressure reducing valve to allow the floating V-block of the seventh hydraulic cylinder to push the side of the workpiece. Then open the third sequence valve and adjust the sixth flow valve to adjust the pushing force of the floating V-block to press the side of the workpiece to complete the positioning and clamping of the workpiece.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-cylinder linkage hydraulic tooling, characterized in that: It comprises a tooling base (8) and a first hydraulic cylinder (1), a second hydraulic cylinder (2), a third hydraulic cylinder (3), a fourth hydraulic cylinder (4), a fifth hydraulic cylinder (5), a sixth hydraulic cylinder (6) and a seventh hydraulic cylinder (7) which are arranged on the tooling base (8); The first hydraulic cylinder (1) has a claw piece (11) for expanding the inner wall of the workpiece, and the second hydraulic cylinder (2), the third hydraulic cylinder (3), the fourth hydraulic cylinder (4), the fifth hydraulic cylinder (5), the sixth hydraulic cylinder (6) and the seventh hydraulic cylinder (7) are arranged around the first hydraulic cylinder (1), wherein the second hydraulic cylinder (2) and the third hydraulic cylinder (3) are arranged opposite to each other and are used to support the workpiece, the fourth hydraulic cylinder (4) pushes the workpiece in a first direction, and the fifth hydraulic cylinder (5) pushes the workpiece in a second direction until the workpiece reaches a reference position, wherein the fourth hydraulic cylinder (4) pushes a hook (9), the hook (9) is a lever arrangement, the hook (9) pushes the workpiece to a side support point and limits its turning, the fifth hydraulic cylinder (5) pushes the workpiece to a flow channel support point, and the first direction and the second direction are different directions; the sixth hydraulic cylinder (6) and the seventh hydraulic cylinder (7) are arranged opposite to each other, the sixth hydraulic cylinder (6) is a support cylinder for supporting the bottom of the workpiece, the seventh hydraulic cylinder (7) is provided with a floating V-block (71) for pressing the workpiece near the front end of the workpiece, and the seventh hydraulic cylinder (7) uses the floating V-block (71) to press the workpiece sideways; The hydraulic circuit corresponding to the hydraulic tooling is provided with three sequence valves and six flow valves, wherein the first sequence valve controls the action of the first hydraulic cylinder (1), the second sequence valve controls the action of the sixth hydraulic cylinder (6), and the third sequence valve controls the action of the seventh hydraulic cylinder (7); The flow valve is used to control the speed of movement of the hydraulic cylinder, and the flow valve corresponds to the first hydraulic cylinder (1), the second hydraulic cylinder (2), the third hydraulic cylinder (3), the fourth hydraulic cylinder (4), the fifth hydraulic cylinder (5), and the seventh hydraulic cylinder (7) one by one; The opening and closing sequence of the sequence valve and the flow valve is as follows: Opening the first sequence valve and adjusting the first flow valve to adjust the tightening force of the claw piece (11); The second flow valve, the third flow valve, the fourth flow valve and the fifth flow valve are adjusted to adjust the second hydraulic cylinder (2), the third hydraulic cylinder (3), the fourth hydraulic cylinder (4) and the fifth hydraulic cylinder (5) to move synchronously; Open the second sequence valve to control the sixth hydraulic cylinder to start; Then open the third sequence valve and adjust the sixth flow valve to adjust the pushing force of the floating V-block of the seventh hydraulic cylinder on the side of the workpiece.

2. The multi-cylinder linkage hydraulic tooling according to claim 1 is characterized in that: The fourth hydraulic cylinder (4) and the fifth hydraulic cylinder (5) are single-acting hydraulic cylinders.

3. The multi-cylinder linkage hydraulic tooling according to claim 1, characterized in that: The second hydraulic cylinder (2), the third hydraulic cylinder (3) and the seventh hydraulic cylinder (7) are 25 thin cylinders.

4. The multi-cylinder linkage hydraulic tooling according to claim 1, characterized in that: The first hydraulic cylinder (1) comprises a built-in chuck, the claw pieces (11) are arranged on the built-in chuck, and the number of the claw pieces (11) is three.

5. The multi-cylinder linkage hydraulic tooling according to claim 1, characterized in that: Two pressure reducing valves are provided on the hydraulic circuit corresponding to the hydraulic tooling, and the two pressure reducing valves are used to control the tightening force of the claw piece (11) of the first hydraulic cylinder (1) and the jacking force of the seventh hydraulic cylinder (7) respectively.

6. A method for using the multi-cylinder linkage hydraulic tooling according to any one of claims 1 to 5, characterized in that: include: The first hydraulic cylinder is actuated so that the claw of the first hydraulic cylinder expands and supports the inner wall of the workpiece; The second hydraulic cylinder, the third hydraulic cylinder, the fourth hydraulic cylinder, and the fifth hydraulic cylinder act synchronously, wherein the second hydraulic cylinder and the third hydraulic cylinder support the workpiece, the fourth hydraulic cylinder pushes the workpiece to the side support point, and the fifth hydraulic cylinder pushes the workpiece to the flow channel support point; The sixth hydraulic cylinder is actuated to support the bottom of the workpiece; The seventh hydraulic cylinder is actuated to press the side of the workpiece to complete the positioning and clamping of the workpiece.

7. The method according to claim 6, based on the multi-cylinder linkage coordinated hydraulic tooling according to claim 5, is characterized in that: The opening and closing methods of sequence valves, pressure reducing valves and flow valves are as follows: Open the first pressure reducing valve to open the claw of the first hydraulic cylinder, then open the first sequence valve, and adjust the first flow valve to adjust the tightening force of the claw; Adjust the second flow valve, the third flow valve, the fourth flow valve, and the fifth flow valve to adjust the second hydraulic cylinder, the third hydraulic cylinder, the fourth hydraulic cylinder, and the fifth hydraulic cylinder to act synchronously; Open the second sequence valve to control the sixth hydraulic cylinder to start; Open the second pressure reducing valve to make the floating V-block of the seventh hydraulic cylinder push the side of the workpiece, then open the third sequence valve, and adjust the sixth flow valve to adjust the jacking force of the floating V-block.

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