Automatic explosive column press-fitting equipment and method

Abstract

The invention belongs to the technical field of explosive and powder assembly, and discloses an automatic press-fitting device and method for an explosive column, and the automatic press-fitting device comprises a conveying mechanism, an anti-explosion delivery window and a press-fitting machine; the conveying mechanism comprises a conveying trolley and polish rod conveyors, a plurality of sections of polish rod conveyors which are connected end to end form an annular conveying line, and the conveying trolley can run on the annular conveying line; the anti-explosion delivery window is used for separating a feeding station and a discharging station of the annular conveying line from a press-fitting station. And the press-fitting machine is arranged on the press-fitting station. On the premise that the quality performance of explosive products is guaranteed, the production efficiency is improved, the safety coefficient is increased, the labor intensity is reduced, and man-machine isolation is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of explosive assembly, and in particular relates to an automatic pressing method for explosive columns. Background Art

[0002] A certain product has armor-piercing function, and is filled with 1kg of blunt black aluminum explosive column. When assembling the product, the operator needs to coat the bottom and cylindrical surface of the explosive column with glue and put it into the shell. There are bubbles or inadequate bonding between the explosive column and the shell, which may cause premature explosion of the projectile under the action of launch overload. In order to ensure that the explosive column and the shell are tightly connected, a mechanical device is required to apply a certain external force to the product loaded with explosives to expel the air between the explosive column and the shell, and avoid bubbles and pores between the explosive column and the shell.

[0003] In the early stage of the production of this product, a mechanical clamping device was used to press and hold the explosive column. The mechanical clamping device consists of a frame, a screw, and a pressure head. The screw and the pressure head are connected by a tapered roller bearing. During production, a torque wrench is used to tighten the screw manually. The rotation of the screw drives the pressure head downward to press and hold the product. After pressing, the product quality meets the requirements. However, manual tightening is labor-intensive, production efficiency is low, and the operator faces the explosive column directly, which poses certain safety risks. Summary of the invention

[0004] The technical problem to be solved by the present invention is that manual operation has high labor intensity, low production efficiency, and operators face the drug column directly, which poses certain safety risks.

[0005] In order to solve the above technical problems, the specific technical solutions of the present invention are as follows:

[0006] An automatic pressing device for explosive columns, comprising a conveying mechanism, an explosion-proof transfer window and a pressing machine;

[0007] The conveying mechanism includes a conveying trolley and a light-bar conveyor. Several sections of light-bar conveyors connected end to end form a circular conveyor line. The conveying trolley can run on the circular conveyor line; the explosion-proof transfer window is used to separate the loading and unloading stations of the circular conveyor line from the pressing station; the pressing machine is arranged on the pressing station.

[0008] Furthermore, the conveying trolley includes a positioning tool 5, a vehicle body 6, and driving wheels 7; the positioning tool 5 is arranged on the top of the vehicle body, and there are two rows of driving wheels 7 at the bottom of the vehicle body; the motor drive component 4 drives the driving shaft 3 to rotate forward and reverse, driving the vehicle body 6 forward and backward, thereby realizing the automatic transportation of products between various workstations along the circular conveyor line.

[0009] Furthermore, the press machine is provided with 6 pressing heads, and each pressing head is controlled by a separate servo motor.

[0010] Furthermore, an anvil assembly is provided on the pressing station, and the anvil assembly is arranged below the conveying trolley, and the anvil assembly includes a cylinder 1 22, an anvil 19, a cylinder 21, and an anvil board 20; when working, the anvil 19 is located directly below the positioning tooling 5; the telescopic end of the cylinder 1 22 is arranged upward, and the anvil 19 is fixed to the telescopic end of the cylinder 1 22; the cylinder 21 is arranged horizontally, and its telescopic end is fixed to the anvil board 20; the anvil 19 can fully fit with the groove on the top of the anvil board 20.

[0011] Furthermore, a limit ring 18 is provided on the pressure head.

[0012] Furthermore, the limiting ring 18 cooperates with the groove on the top of the cylinder 14 .

[0013] The present invention also provides an automatic pressing method for explosive columns, which is implemented based on the automatic pressing device for explosive columns, and comprises the following steps:

[0014] Step 1: Automatic positioning of the conveyor trolley

[0015] When the conveying trolley transports the product to the pressing station and is stopped by the blocking mechanism on the line body, the proximity switch on the pressing machine detects that the trolley is in place and sends a signal. At this time, the rod of the positioning cylinder 9 of the pressing station extends and enters the positioning hole 8 of the conveying trolley. When the magnetic switch sensor on the cylinder detects that the rod of the positioning cylinder is extended into place, the trolley is accurately positioned and the pressing head is pressed down.

[0016] Step 2: Combined mechanical limit

[0017] The press machine forms a combined mechanical limit through the limit ring 18 on the press head, the cylinder 14, the positioning tool 5 and the anvil assembly 16;

[0018] Step 3: Automatic Pressing

[0019] The press machine can press 6 products at the same time; during press, the explosion-proof servo motor and reducer 10 drive the screw 12 of the press machine to rotate, and the pressure head 13 presses down. When the pressure head 13 contacts the explosive column in the shell 14, the torque value continues to increase; when the set torque is reached, the pressure is maintained according to the set torque. When the set pressure holding time is reached, the motor rotates in the opposite direction, and the pressure head 13 automatically resets to complete a pressing process.

[0020] Among them, an explosion-proof torque sensor 11 is provided between the reducer 10 and the screw 12 of the press machine, which can detect the torque of the pressure-maintaining device in real time. When the torque exceeds the set torque range, the equipment automatically stops for protection.

[0021] Among them, the speed of the motor is adjustable, and the pressing speed and displacement of the pressure head can be detected in real time through the encoder.

[0022] The present invention has the following advantages: the transfer and pressing of explosive products are realized through the automated conveyor line and pressing equipment, replacing the original manual mechanical pressure-maintaining device, and removing dangerous workers. The method can improve production efficiency, increase safety factor, reduce labor intensity, and realize human-machine isolation while ensuring the quality and performance of explosive products. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a mechanical clamping device;

[0024] Figure 2 It is the overall layout diagram of automatic pressing of explosive columns;

[0025] Figure 3 This is a schematic diagram of a light bar conveyor;

[0026] Figure 4 This is a schematic diagram of the transport trolley;

[0027] Figure 5 for Figure 4 A top view of

[0028] Figure 6 is a schematic diagram of the positioning mechanism;

[0029] Figure 7 It is a schematic diagram of a press machine;

[0030] Figure 8 It is a schematic diagram of combined mechanical limit;

[0031] Fig. 9 This is a schematic diagram of the combined limit before automatic press-fitting;

[0032] Fig.10 This is a schematic diagram of combined limit in automatic press-fitting state;

[0033] Fig.11 This is a schematic diagram of an explosion-proof transfer window;

[0034] Markings in the figure: 1-machining, 2-fixed axis, 3-driving axis, 4-motor drive assembly, 5-positioning tooling, 6-car body, 7-driving wheel, 8-positioning hole, 9-positioning cylinder, 10 explosion-proof motor, reducer, 11-torque sensor, 12-screw, 13-pressure head, 14-cylinder, 15-conveying trolley, 16-anvil assembly, 17-pressure head body, 18-pressure head limit ring, 19-anvil, 20-anvil, 21-cylinder two, 22-cylinder one. DETAILED DESCRIPTION

[0035] In order to better understand the purpose, structure and function of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings.

[0036] The present invention first designs an automatic pressing device, the overall layout of which (see Figure 2 ), the automatic pressing equipment consists of the following parts: conveyor, explosion-proof transfer window, and pressing machine.

[0037] The conveyor adopts a light bar conveyor, which is mainly composed of a conveyor trolley, a six-section light bar conveyor (the part passing through the explosion-proof transfer window is divided into two sections, separated by the explosion-proof transfer window) and four turntables, which can realize the circulation of products along the circular conveyor line and maintain continuous production. The conveyor trolley, as a carrier for conveying products, can run smoothly and accurately position on the conveyor line. Each conveyor trolley can hold up to 6 products at a time.

[0038] The explosion-proof transfer window is a passage for conveying trolleys and products to enter and exit the explosion-proof room. When the equipment is assembled and pressurized, the explosion-proof transfer window can isolate dangerous processes and operators to ensure the safety of operators and facilities outside the explosion-proof room. The explosion-proof transfer window is driven by a cylinder, and the opening and closing of the window is electrically interlocked with the actions of other equipment to ensure that the explosion-proof window is in a completely closed state during the pressing process.

[0039] The press machine is driven by an explosion-proof servo motor. The reducer drives the screw to rotate, the pressure head presses down, and the downward force continues to rise. When the system set torque is reached, the system automatically maintains pressure under the set torque. When the set pressure holding time is reached, the motor rotates in the opposite direction, the pressure head automatically resets, and a pressing process is completed. An explosion-proof torque sensor is installed between the reducer and the screw of the pressure holding device, which can detect the torque of the pressure holding device in real time. When the set torque range is exceeded, the equipment automatically stops for protection.

[0040] This embodiment includes the following design points:

[0041] 1. Automatic product delivery

[0042] Automatic conveying is to realize the product conveying between the loading and unloading station and the pressing station through the conveying system (see Figure 2 The conveying system is a roller friction transmission structure, which consists of a conveying trolley, a six-section smooth-bar conveyor divided into two sections through an explosion-proof transfer window, separated by an explosion-proof transfer window) and four turntables.

[0043] Bar conveyor (see Figure 3 ) consists of a frame 1, a fixed axis 2, a drive axis 3, and a motor drive assembly 4. Figure 4 , mainly composed of positioning tooling 5, vehicle body 6, driving wheels 7, etc. There are two rows of driving wheels 7 at the bottom of the conveying trolley. The driving wheel in contact with the driving shaft 3 is at a 45° angle with the driving shaft; the driving wheel in contact with the fixed shaft 2 is parallel to the fixed shaft axis. Under the control of the automatic control program, the motor drive component 4 drives the driving shaft 3 to rotate forward and reverse, driving the conveying trolley 6 forward and backward, realizing the automatic transportation of products between various stations along the circular conveyor line.

[0044] 2. Automatic pressing of explosive columns

[0045] Step 1: Automatic positioning of the conveyor trolley

[0046] Automatic positioning of conveyor (see Figure 5 ), when the conveying trolley transports the product to the pressing station and is stopped by the blocking mechanism on the line body, the proximity switch on the pressing machine detects that the trolley is in place and sends a signal. At this time, the rod of the positioning cylinder (9) extends and enters the positioning hole (8) of the conveying trolley. When the magnetic switch sensor on the cylinder detects that the rod of the positioning cylinder is extended into place, the trolley is accurately positioned and the pressing head is pressed down.

[0047] Step 2: Automatic Pressing

[0048] The press machine is equipped with 6 pressing heads. After the trolley is accurately positioned, the press machine can complete the pressing of 6 products at the same time. Each pressing head is controlled by a separate servo motor. The torque of each pressing head can be set and recorded separately. During pressing, the explosion-proof servo motor and reducer 10 drive the screw 12 of the press machine to rotate, and the pressing head 13 presses down. When the pressing head 13 contacts the explosive column in the shell 14, the torque value continues to rise. When the system set torque is reached, the system automatically maintains the pressure according to the set torque. When the set pressure holding time is reached, the motor rotates in the opposite direction, and the pressing head 13 automatically resets to complete a pressing process.

[0049] An explosion-proof torque sensor 11 is provided between the reducer 10 and the screw 12 of the press machine, which can detect the torque of the pressure-maintaining device in real time. When the torque exceeds the set torque range, the equipment automatically stops for protection. The speed of the motor is adjustable, and the encoder can detect the pressing speed and displacement of the pressure head in real time to ensure that the pressing action of the pressure head is slow, uniform, and even.

[0050] Step 3: Combined mechanical limit

[0051] The design of multiple pressure heads makes the internal space of the press machine narrow, and it is difficult to perform mechanical limiting by traditional limiting columns. The present invention adds a limiting ring design to the pressure head. The press machine forms a combined mechanical limit through the combined mechanical limit (see Figure 8 ) Ensure production safety and avoid safety risks caused by over-pressure pressing.

[0052] In order to ensure that the positioning tooling of the conveyor trolley is effectively separated from the trolley body during press-fitting and to avoid the conveyor trolley and the light bar being subjected to force during press-fitting, an anvil assembly is designed under the conveyor trolley at the press-fitting station (see Fig. 9 , Fig.10). When the conveying trolley arrives at the pressure holding station and is accurately positioned, the anvil assembly 16 is activated. The cylinder 1 22 extends upward to lift the anvil 19 and support the positioning tooling 5 above the conveying trolley; after the anvil 19 is lifted, the cylinder 2 21 extends the anvil plate 20 to the press-fitting station and places it under the anvil 19; the cylinder 1 20 falls back, and the anvil 19 and the anvil plate 20 are in mechanical contact with the fuselage frame to form an anvil assembly.

[0053] 3. Explosion-proof isolation.

[0054] Through the explosion-proof transfer window (see Fig.11 ) to isolate the loading and unloading stations from the pressing stations. The explosion-proof transfer window is the passage for conveying trolleys and products to enter and exit the explosion-proof room. When the equipment is assembled and pressurized, the explosion-proof transfer window can isolate dangerous processes and operators to ensure the safety of operators and facilities outside the explosion-proof room. The explosion-proof transfer window is driven by a cylinder, and the opening and closing of the window is electrically interlocked with the actions of other equipment to ensure that the explosion-proof window is in a completely closed state during the pressing process.

[0055] The effects of the present invention are as follows: first, the process layout is adjusted, and the pressing station is arranged in an explosion-proof room. The operator sets parameters and controls the equipment through the explosion-proof touch screen to carry out the assembly and pressure maintenance of the explosive column, so that human-machine isolation can be achieved; second, the integrated structure design of the pressure head limit ring, through the limit ring on the equipment pressure head, the cylinder, the conveying trolley base and the metal anvil block, a combined mechanical limit is formed to improve the inherent safety of the equipment; third, automatic control, PLC automatically controls the servo motor to drive the screw rod and the pressure head downward, replacing the traditional manual torque wrench screwing in the explosives industry, and reducing the labor intensity of the pressing workers to the maximum extent; fourth, the multi-pressure head pressing design, the equipment conveying carrier is provided with 6 product positioning tooling, the pressure maintaining device is provided with six pressure heads, the equipment can complete the pressing of 6 products at the same time each time, and greatly improves the production efficiency.

[0056] When the mechanical clamping device is used manually to maintain the pressure of the explosive column, the screw rod is manually screwed to maintain the pressure of the product one by one, which is labor-intensive; and during the pressing process, the clamping device applies external force to the explosive column, and the operator faces the explosive column directly, and the human-machine isolation is not achieved (see Figure 1 ).

[0057] After the invention is applied, manual loading and unloading is adopted, and the equipment automatically transports the product, automatically positions, automatically presses, and automatically transports out of the explosion-proof room to the unloading station. The system performs press-fitting and pressure-maintaining according to the preset torque and pressure-maintaining time.

[0058] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, it is apparent to those skilled in the art that several modifications and improvements may be made without departing from the principles of the present invention, and these modifications and improvements should also be considered to fall within the scope of protection of the present invention.

Claims

1. An automatic pressing device for explosive columns, characterized in that: It includes conveying mechanism, explosion-proof transfer window and press machine; The conveying mechanism includes a conveying trolley and a light-bar conveyor. Several sections of light-bar conveyors connected end to end form a circular conveyor line. The conveying trolley can run on the circular conveyor line; the explosion-proof transfer window is used to separate the loading and unloading stations of the circular conveyor line from the pressing station; the pressing machine is arranged on the pressing station.

2. The automatic explosive column pressing equipment according to claim 1 is characterized in that: The conveying trolley comprises a positioning tool (5), a vehicle body (6), and driving wheels (7); the positioning tool (5) is arranged on the top of the vehicle body, and two rows of driving wheels (7) are arranged on the bottom of the vehicle body; the motor drive assembly (4) drives the driving shaft (3) to rotate forward and reverse, driving the vehicle body (6) to move forward and backward, thereby realizing automatic conveyance of products between various workstations along the circular conveyor line.

3. The automatic explosive column pressing equipment according to claim 2 is characterized in that: The press machine is provided with 6 pressing heads, each of which is controlled by a separate servo motor.

4. The automatic explosive column pressing equipment according to claim 3 is characterized in that: The pressing station is provided with an anvil assembly, which is arranged below the conveying trolley, and comprises a cylinder 1 (22), an anvil (19), a cylinder 2 (21), and an anvil board (20); when in operation, the anvil (19) is located directly below the positioning tool (5); the telescopic end of the cylinder 1 (22) is arranged upward, and the anvil (19) is fixed to the telescopic end of the cylinder 1 (22); the cylinder 2 (21) is arranged horizontally, and its telescopic end is fixed to the anvil board (20); the anvil (19) can be completely matched with the groove on the top of the anvil board (20).

5. The automatic explosive column pressing device according to claim 4 is characterized in that: A limit ring (18) is arranged on the pressure head.

6. The automatic explosive column pressing device according to claim 5, characterized in that: The limiting ring (18) cooperates with the groove at the top of the cylinder (14).

7. A method for automatically pressing explosive columns, characterized in that: The method is implemented based on the automatic explosive column pressing device according to claim 6, and comprises the following steps: Step 1: Automatic positioning of the conveyor trolley When the conveying trolley transports the product to the pressing station and is stopped by the blocking mechanism on the line body, the proximity switch on the pressing machine detects that the trolley is in place and sends a signal. At this time, the rod of the positioning cylinder (9) of the pressing station extends and enters the positioning hole (8) of the conveying trolley. When the magnetic switch sensor on the cylinder detects that the rod of the positioning cylinder is extended into place, the trolley is accurately positioned and the pressing head is pressed down. Step 2: Combined mechanical limit The press machine forms a combined mechanical limit through the cooperation of the limit ring (18) on the press head, the cylinder (14), the positioning tool (5) and the anvil assembly (16); Step 3: Automatic Pressing The press machine can press 6 products at the same time. During press, the explosion-proof servo motor and the reducer (10) drive the screw (12) of the press machine to rotate, and the pressing head (13) presses down. When the pressing head (13) contacts the explosive column in the shell (14), the torque value increases continuously. When the set torque is reached, the pressure is maintained according to the set torque. When the set pressure holding time is reached, the motor rotates in the opposite direction, and the pressing head (13) automatically resets, completing a pressing process.

8. The method for automatically pressing explosive columns according to claim 7, characterized in that: An explosion-proof torque sensor (11) is provided between the reducer (10) and the screw rod (12) of the press machine, which can detect the torque of the pressure-maintaining device in real time. When the torque exceeds the set torque range, the device automatically stops for protection.

9. The method for automatically pressing explosive columns according to claim 7, characterized in that: The speed of the motor is adjustable, and the encoder can detect the pressing speed and displacement of the pressure head in real time.

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