Automatic press-fitting and edge-rolling device and method for shell assembly

Abstract

The invention discloses an automatic press fitting and edge rolling device and method for a shell assembly. The device comprises a pressurizing module, a spin riveting head, a spinning head, a spinning head base, a lower pressing head, a lower pressing head base, a soft claw clamp, a rotating module, a sliding flat plate and a machining platform. The method comprises the following steps of: pre-assembling a coil framework and a shell together on an elastic clamping jaw jig; the clamping jaw clamp is tightened, and the press is pressed; the press machine is lifted, and the spinning head jig is switched; and the spinning head descends to perform rotary binding and closing on the shell, and finally, the shell of the shell assembly meets the use requirement after being pressed, bound and closed. According to the method, the automatic shell pressing and edge rolling closing-in machining method of the shell assembly is effectively achieved, the typical structure drawing is shown in the figure 1, the process requirement is simple and clear, and the use performance requirement of the part can be reliably guaranteed.

Description

Technical Field

[0001] The present application belongs to the technical field of liquid rocket engine manufacturing, and specifically relates to a method for pressing and rolling an electric valve coil assembly of a liquid rocket engine. Background Art

[0002] A solenoid valve is a valve that is operated by an electromagnet that converts electrical energy into mechanical energy.

[0003] For rocket engines using direct current liquids such as liquid oxygen / hydrocarbons, liquid oxygen / liquid hydrogen, high-pressure solenoid valves are generally used to supply or remove control gas to each pneumatic valve, or to control the purge gas. The quality and performance reliability of the coil assembly are crucial to the performance of the electric valve. At present, the traditional process uses a press to manually press the shell, which is easy to press in place or press off-center. Burrs are easy to form around the shell when rolling on the lathe. In severe cases, the shell coating will fall off. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a device and method for automatic press-fitting and hemming of a shell assembly, which is applied to the technical field of liquid rocket engines. The method has simple and clear process requirements and provides the product with higher assembly accuracy and performance requirements.

[0005] The technical solution of the present invention is: an automatic press-fitting hemming device for a shell assembly, comprising a pressurizing module, a riveting head, a spinning head, a spinning head base, a pressing head, a pressing head base, a soft claw fixture, a rotating module, a sliding plate and a machining platform;

[0006] The pressurizing module is fixed on the machining platform and connected to the rivet head; the rivet head is controlled by the pressurizing module and has a telescopic function, and can connect or release the pressing head and release the spinning head;

[0007] The sliding plate is placed on the machining platform and can move linearly along the guide rail on the machining platform; the rotating module is fixed on the sliding plate and connected to the soft claw clamp, and the rotating module can rotate around its own rotation center; a pressure block is provided at the bottom of the soft claw clamp to realize the positioning and clamping of the shell assembly;

[0008] The pressing head is installed on the sliding plate through the pressing head base, and can be moved to the bottom of the rivet head through the sliding plate, and then the pressing head is lifted up through the pressing head base, and the rivet head can be extended to dock and fix the pressing head through the pressurizing module; after the rivet head is connected to the pressing head, the soft claw fixture moves to the bottom of the pressurizing module, and the pressing head is pressed down to realize the press-fitting of the shell assembly by the pressing head;

[0009] The spinning head is installed on the sliding plate through the spinning head base. When the sliding plate moves to the bottom of the rivet head, the top of the spinning head is lifted by the spinning head base, and the rivet head is extended to dock and fix the spinning head. After the rivet head is connected to the spinning head, it moves to the bottom of the pressurizing module and presses the shell assembly. The rotating module rotates to realize the rolling and closing of the shell assembly.

[0010] The lower pressure head is composed of a first upper riveted connector and a lower pressure block; the lower pressure block is placed on the lower pressure head base, and is used to perform pressure execution when the lower pressure head presses the shell assembly. The first upper connection head is connected and fixed to the rotary rivet head, and is used to connect the rotary rivet head and the lower pressure head, so as to drive the lower pressure head to move up and down and apply force.

[0011] The spinning head consists of a second upper connecting head and two 45° bearings at the lower end; the two 45° bearings at the lower end are placed on the spinning head base, and are used to execute the rolling force when rolling the shell assembly. The second upper connecting head is connected and fixed to the rivet head, and is used for the connection between the rivet head and the spinning head, and plays a role in driving the spinning head to move up and down and apply force.

[0012] The lower pressure head base is composed of an upper support, a cylinder or a motor, and is raised or lowered by pneumatic or electric control, and is used to place the lower pressure head and raise it when in use.

[0013] The spinning head base is composed of an upper support, a cylinder or a motor, and is raised or lowered by pneumatic or electric control, and is used to place the spinning head and raise it when using it.

[0014] The rotating module adopts a rotating shaft controlled by a motor to control the rotating angle and speed of the housing assembly during press fitting and hemming.

[0015] The method for press-fitting hemming using the device comprises:

[0016] The shell assembly to be processed is loaded into the soft jaw clamp, and the soft jaw clamp automatically clamps and holds;

[0017] The sliding plate is controlled to drive the lower pressure head to move to the bottom of the pressurizing module, and the lower pressure head base is controlled by the cylinder to raise the lower pressure head and connect and fix it under the riveting head to start the press-fitting operation of the shell assembly;

[0018] After the press-fitting operation is completed, the lower press head is lifted up and returned to its initial position under the action of the press module; the sliding plate drives the lower press head base to move to the bottom of the press module, and the lower press head is placed on the lower press head base;

[0019] The sliding plate drives the spinning head to move to the bottom of the pressurizing module, and the spinning head is raised and connected and fixed under the rivet head through the spinning head base to start the hemming operation on the shell assembly;

[0020] The sliding plate drives the spinning head base to move to the bottom of the pressurizing module, and places the spinning head on the spinning head base;

[0021] Release the soft claw clamp, take out the shell assembly, and complete the press-fitting and rolling of the shell assembly.

[0022] The press-fitting operation of the shell assembly includes: the sliding plate drives the soft claw fixture to move to the bottom of the pressurizing module, and the lower press head presses the shell assembly according to a predetermined pressure value under the action of the pressurizing module.

[0023] When pressing the shell component according to the predetermined pressure value, the maximum displacement is set according to the product structure, and pressing is performed in multiple directions corresponding to rotation. Pressing is performed once for each rotation angle α. Each time the pressure value is set to be uniformly increased to the predetermined pressure value, and pressing is performed until it can no longer move downward.

[0024] The rolling operation on the shell component includes: the sliding plate drives the rotating module to move to the bottom of the pressurizing module, and the spinning head is pressed under the action of the pressurizing device; then the rotating module drives the shell component to rotate and perform rotary rolling until the rolling is completed.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention replaces the method of pressing the shell component alone by a CNC press and rolling the shell component by a CNC lathe by adding a spinning head and a lower pressure head structure; in addition, the equipment and tooling required for pressing the shell component and the equipment and tooling required for rolling the shell component are integrated into a whole, including using a press module to integrate the press and the riveting head, and a sliding plate to integrate the lower pressure head base, the spinning head base, and the rotating module. The lower pressure head and the spinning head are switched by pneumatic and electric control to press and roll the shell component. While ensuring that the pressing and rolling of the shell component meet the use requirements, the operating steps of the pressing and rolling of the shell component are optimized, and the dependence on personnel is reduced; during the assembly process, the rapid switching of the clamping, pressing and rolling of parts is realized. The processing problems caused by the cumbersome loading and unloading, poor consistency, and poor rolling effect of the traditional clamping method are solved, and the effect of improving labor efficiency and increasing product quality is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The figure is an overall structural view of an automatic press-fit hemming device for a shell assembly. DETAILED DESCRIPTION

[0027] The following will be combined Figure 1 Specific embodiments further illustrate the specific implementation scheme of the present invention.

[0028] An automatic press-fitting hemming device for a shell component comprises a pressurizing module 1, a riveting head 2, a spinning head 3, a spinning head base 4, a pressing head 5, a pressing head base 6, a soft claw fixture 7, a rotating module 8, a sliding plate 9 and a machining platform 10;

[0029] The pressurizing module 1 is fixed on the machining platform 10 and connected to the rivet head 2; the rivet head 2 is controlled by the pressurizing module 1 and has a telescopic function, and can connect or release the pressing head 5 and release the spinning head 3;

[0030] The sliding plate 9 is placed on the machining platform 10 and can move linearly along the guide rail on the machining platform 10; the rotating module 8 is fixed on the sliding plate 9 and connected to the soft claw clamp 7, and the rotating module 8 can rotate around its own rotation center; a pressure block is provided at the bottom of the soft claw clamp 8 for positioning and clamping the housing assembly 11;

[0031] The pressing head 5 is installed on the sliding plate 9 through the pressing head base 6, and can be moved to the bottom of the rivet head 2 through the sliding plate 9, and then the pressing head 2 is lifted up through the pressing head base 6, and the rivet head 2 can be extended to dock and fix the pressing head 5 through the pressurizing module 1; after the rivet head 2 is connected to the pressing head 5, the soft claw clamp 8 moves to the bottom of the pressurizing module 1, and is pressed down through the pressing head 5, so as to realize the press-fitting of the housing assembly 11 by the pressing head;

[0032] The spinning head 3 is installed on the sliding plate 9 through the spinning head base 4. When the sliding plate 9 moves to the bottom of the rivet head 2, the spinning head 2 is lifted up by the spinning head base 4, and the rivet head 2 is extended to dock and fix the spinning head 3; after the rivet head 2 is connected to the spinning head 3, it moves to the bottom of the pressurizing module 1 and presses the shell assembly 11, and the rotating module 8 rotates to realize the rolling and closing of the shell assembly 11.

[0033] The lower pressure head 5 is composed of a first upper riveted connector and a lower pressure block; the lower pressure block is placed on the lower pressure head base 6, and is used to perform pressure execution when the lower pressure head 5 presses the shell assembly. The first upper connector is connected and fixed to the rotary rivet head 2, and is used to connect the rotary rivet head and the lower pressure head, so as to drive the lower pressure head to move up and down and apply force.

[0034] The spinning head 3 is composed of a second upper end connecting head and two 45° bearings at the lower end; the two 45° bearings at the lower end are placed on the spinning head base 4, and are used to execute the rolling force when rolling the shell assembly. The second upper end connecting head is connected and fixed to the rivet head 2, and is used for the connection between the rivet head and the spinning head, and plays a role in driving the spinning head to move up and down and apply force.

[0035] The lower pressure head base 6 is composed of an upper support, a cylinder or a motor, and is raised or lowered by pneumatic or electric control, and is used to place the lower pressure head and raise it when in use.

[0036] The spinning head base 4 is composed of an upper support, a cylinder or a motor, and is raised or lowered by pneumatic or electric control, and is used to place the spinning head and raise it when using it.

[0037] The rotating module 8 uses a rotating shaft controlled by a motor to control the rotation angle and speed of the housing assembly during press-fitting and hemming.

[0038] The present invention also relates to a method for press-fitting hemming using the above device, the steps of which are:

[0039] Step 1: Assemble the housing assembly 11; assemble the housing assembly together according to the design requirements for press-fitting.

[0040] Step 2: Install the housing assembly 11 into the soft claw clamp 7, and the soft claw clamp 7 automatically clamps and holds;

[0041] Step 3: Automatically control the sliding plate 9 to drive the lower pressure head 5 to move to the bottom of the pressurizing module 1, and control the lower pressure head base 6 through the cylinder to raise the lower pressure head 5 and connect and fix it under the riveting head 2;

[0042] Step 4: Press-fit the housing assembly 11;

[0043] The specific process is: the sliding plate 9 drives the soft claw clamp 7 to move to the bottom of the pressurizing module 1, and the lower pressure head 5 presses the shell component 11 according to the predetermined pressure value under the action of the pressurizing module 1. The maximum displacement should be set according to the product structure during pressing. The pressing condition can be checked and can be divided into steps 1 to 4 for pressing. Pressing corresponds to rotating in n directions, n=4, and pressing once for each rotation angle α, α=0, 180°, 120°, 90°. Each pressure value is set to be uniformly increased to the predetermined pressure value, and the pressure is pressed until it can no longer move downward.

[0044] Step 5: The lower pressure head 5 is lifted up to the initial position under the action of the pressurizing module 1; the sliding plate 9 drives the lower pressure head base 6 to move to the bottom of the pressurizing module 1, and the lower pressure head 5 is placed on the lower pressure head base 6;

[0045] Step 6: The sliding plate 9 drives the spinning head 3 to move to the bottom of the pressurizing module 1, and the spinning die head 3 is lifted and connected and fixed under the spin riveting head 2 through the spinning head base 4;

[0046] Step 7: Rolling the shell assembly 11;

[0047] The specific process is as follows: the sliding plate 9 drives the rotating module 8 to move to the bottom of the pressurizing module 1, and the spinning head 3 is pressed tightly under the action of the pressurizing device 1; then the rotating module 8 drives the housing assembly 11 to rotate and perform rotary rolling until the rolling is completed;

[0048] Step 8: The sliding plate 9 drives the spinning head base 4 to move to the bottom of the pressurizing module 1, and the spinning head 3 is placed on the spinning head base 4;

[0049] Step nine, loosen the soft claw clamp 7, take out the shell assembly 11, and complete the press-fitting and rolling of the shell assembly 11.

[0050] Those skilled in the art should understand that the above embodiments are merely exemplary embodiments, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be covered within the protection scope of the present invention.

Claims

1. An automatic press-fitting hemming device for a housing assembly, characterized in that: It comprises a pressurizing module (1), a riveting head (2), a spinning head (3), a spinning head base (4), a pressing head (5), a pressing head base (6), a soft claw fixture (7), a rotating module (8), a sliding plate (9) and a machining platform (10); The pressurizing module (1) is fixed on the machining platform (10) and connected to the rivet head (2); the rivet head (2) is controlled by the pressurizing module (1) and has a telescopic function, and can connect or release the pressing head (5) and release the spinning head (3); The sliding plate (9) is placed on the machining platform (10) and can move linearly along the guide rail on the machining platform (10); the rotating module (8) is fixed on the sliding plate (9) and connected to the soft claw clamp (7), and the rotating module (8) can rotate around its own rotation center; a pressure block is provided at the bottom of the soft claw clamp (8) for realizing the positioning and clamping of the housing assembly (11); The pressing head (5) is installed on the sliding plate (9) through the pressing head base (6), and can be moved to the bottom of the rotary rivet head (2) through the sliding plate (9), and then the pressing head (2) is lifted up through the pressing head base (6), and the rotary rivet head (2) can be extended to dock and fix the pressing head (5) through the pressurizing module (1); after the rotary rivet head (2) is connected to the pressing head (5), the soft claw clamp (8) is moved to the bottom of the pressurizing module (1), and the pressing head (5) is pressed down to realize the pressurization of the shell assembly (11) using the pressing head; The spinning head (3) is installed on the sliding plate (9) through the spinning head base (4). When the sliding plate (9) moves to the bottom of the rotary rivet head (2), the rotary rivet head (2) is lifted up through the rotary rivet head base (4), and the rotary rivet head (2) is extended to dock and fix the spinning head (3). After the rotary rivet head (2) is connected to the spinning head (3), it moves to the bottom of the pressurizing module (1) and presses the shell assembly (11). The rotating module (8) rotates to achieve the rolling and closing of the shell assembly (11).

2. The device according to claim 1, characterized in that: The lower pressure head (5) is composed of a first upper riveted connector and a lower pressure block; the lower pressure block is placed on the lower pressure head base (6) and is used to perform pressure execution when the lower pressure head (5) presses the shell assembly; the first upper connector is connected and fixed to the rotary rivet head (2) and is used to connect the rotary rivet head and the lower pressure head, so as to drive the lower pressure head to move up and down and apply force.

3. The device according to claim 1, characterized in that: The spinning head (3) is composed of a second upper end connecting head and two 45° bearings at the lower end; the two 45° bearings at the lower end are placed on the spinning head base (4) and are used to execute the hemming force when the shell assembly is hemmed. The second upper end connecting head is connected and fixed to the rivet head (2) and is used to connect the rivet head and the spinning head, so as to drive the spinning head to move up and down and apply force.

4. The device according to claim 1, characterized in that: The lower pressure head base (6) is composed of an upper support, a cylinder or a motor, and is raised or lowered by pneumatic or electric control, and is used to place the lower pressure head and raise it when in use.

5. The device according to claim 1, characterized in that: The spinning head base (4) is composed of an upper support, a cylinder or a motor, and is raised or lowered by pneumatic or electric control, and is used to place the spinning head and to raise the spinning head when it is used.

6. The device according to claim 1, characterized in that: The rotating module (8) uses a rotating shaft controlled by a motor to control the rotation angle and speed of the housing component during press fitting and hemming.

7. A method for press-fitting hemming using the device of claim 1, characterized in that: include: The shell component (11) to be processed is placed into the soft claw clamp (7), and the soft claw clamp (7) automatically clamps and holds the shell component; The sliding plate (9) is controlled to drive the lower pressing head (5) to move to the bottom of the pressurizing module (1), and the lower pressing head base (6) is controlled by the cylinder to raise the lower pressing head (5) and connect and fix it under the riveting head (2), and the press-fitting operation of the housing assembly (11) is started; After the press-fitting operation is completed, the lower press head (5) is lifted up and returned to the initial position under the action of the press module (1); the sliding plate (9) drives the lower press head base (6) to move to the bottom of the press module (1), and the lower press head (5) is placed on the lower press head base (6); The sliding plate (9) drives the spinning head (3) to move to the bottom of the pressurizing module (1), and the spinning head (3) is raised and connected and fixed under the spin riveting head (2) through the spinning head base (4), and the shell assembly (11) is started to be rolled; The sliding plate (9) drives the spinning head base (4) to move to the bottom of the pressurizing module (1), and places the spinning head (3) on the spinning head base (4); The soft claw clamp (7) is released, and the housing assembly (11) is taken out, and the press-fitting and rolling of the housing assembly (11) is completed.

8. The method according to claim 7, characterized in that The press-fitting operation of the shell component (11) includes: the sliding plate (9) drives the soft claw clamp (7) to move to the bottom of the press module (1), and the lower press head (5) presses the shell component (11) according to a predetermined pressure value under the action of the press module (1).

9. The method according to claim 8, characterized in that When the shell component (11) is pressed at a predetermined pressure value, a maximum displacement is set according to the product structure, and pressing is performed in multiple directions corresponding to rotation. Pressing is performed once for each rotation angle α, and each pressure value is set to be uniformly increased to a predetermined pressure value, and pressing is performed until it can no longer move downward.

10. The method according to claim 7, characterized in that The rolling operation for the shell component (11) comprises: the sliding plate (9) drives the rotating module (8) to move to the bottom of the pressurizing module (1), and the spinning head (3) is pressed under the action of the pressurizing device (1); then the rotating module (8) drives the shell component (11) to rotate and perform the rolling until the rolling is completed.

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