CN102862010B - Double-end automatic conveyor for connecting rod welding workpiece - Google Patents

Abstract

An automatic conveying device for welding workpieces with double-headed connecting rods, which is composed of a workpiece taking and turning mechanism, a workpiece conveying mechanism between welding processes at both ends, a workpiece lifting and transposition mechanism, a workpiece conveying mechanism between welding and post-processing procedures, and a PLC control system. The workpiece picking and turning mechanism is arranged between the storage box of the connecting rod workpiece welding equipment and the first welding machine. Between the first welding machine and the second welding machine of the workpiece welding equipment, the workpiece conveying mechanism between welding and post-processing procedures is arranged between the second welding machine and the post-processing device of the connecting rod workpiece welding equipment. The invention has the characteristics of high degree of automation and reliable operation, can effectively reduce the labor intensity of operators, reduce hidden dangers in production safety, and improve product quality and welding production efficiency.

Description

An automatic conveying device for welding workpieces with double-headed connecting rods

technical field

The invention relates to a workpiece conveying device, in particular to an automatic conveying device for automobile connecting rod parts during the welding process, belonging to the technical field of automobiles.

Background technique

Automobiles are composed of thousands of parts. In order to reduce costs, improve product quality, improve work efficiency, and reduce labor intensity, all parts manufacturers are developing their production equipment in the direction of automation and humanization. For example, the welding of the stabilizer bar connecting rod of the automobile steering system has various forms such as resistance welding and ordinary welding. Among them, the resistance welding form is completed by the resistance welding machine. It has the characteristics of simplicity, reliability and high work efficiency, and can instantly melt the two electrodes by relying on high current. It can quickly complete the welding of products, and can meet the welding requirements of different types of connecting rod products. It is the most common application in this industry. But resistance welding machine is generally operated by manual operation at present, needs operator to take workpiece with hand and then tops up with cylinder again. During operation, the cylinder pushes the connecting rod on the lower electrode of the resistance welding. If there is no pressing, the current cannot be connected or the contact resistance is large, which will affect the welding quality. During this process, it is very easy for the cylinder to press the finger, which will cause personal injury to the operator. Moreover, there is a problem of inconsistent placement points when taking workpieces by hand, resulting in poor product consistency. This is because when the human hand is placed on the positioning point, the placed product may not be vertical, or the cylinder is tightened without placing the product properly, or the force of each placement is different, resulting in the product not being welded in the proper position, resulting in Product consistency is poor. In addition, during the whole welding process, the two ends of the connecting rod need to be welded separately. Since the connecting rod is composed of three parts, it includes a rod and two round-head-shaped seats. Welding is to weld the round-head-shaped seats to both ends of the rod respectively, and the shape of the round-head seat is an end hole. Small, one end hole is big, after one end is welded, when welding the other end, it is necessary to form a 180-degree angle of the welded transformation angle, that is, the welded product is a round head seat with the small hole facing the opposite direction, and the welding needs to be completed The product at one end is turned over two 180 degrees, the first 180 degrees is to turn over to weld the other end, and the second is the orientation of the round head seat, and it is done under high temperature conditions, both to prevent burns and to When the semi-product is welded to the other end, it should be placed in a good position without deviation, and the cylinder should be tightened so that it cannot shake to ensure the quality of the product after welding. This will cause high labor intensity for the operator and the potential risk of burns.

Contents of the invention

The object of the present invention is to aim at the disadvantages of the prior art, to provide a double-headed link welding workpiece automatic conveying device with high degree of automation, reliable operation, which can reduce the labor intensity of operators, reduce safety hazards in production, and improve welding production efficiency.

Problem described in the present invention is realized with following technical scheme:

An automatic delivery device for welding workpieces with double-end connecting rods, which is composed of a workpiece taking and turning mechanism, a workpiece conveying mechanism between welding processes at both ends, a workpiece jacking and indexing mechanism, a workpiece conveying mechanism between welding and post-processing procedures, and a PLC control system.

In the above-mentioned automatic conveying device for welding workpieces with connecting rods, the workpiece taking and turning mechanism is arranged between the storage box of the connecting rod workpiece welding equipment and the first welding machine, and the workpiece conveying mechanism between the welding processes at both ends is connected to the workpiece top. The lifting and indexing mechanism is arranged between the first welding machine and the second welding machine of the connecting rod workpiece welding equipment, and the workpiece conveying mechanism between the welding and post-processing procedures is arranged between the second welding machine and the second welding machine of the connecting rod workpiece welding equipment. between aftertreatment devices.

In the above-mentioned automatic conveying device for welding workpieces with double-headed connecting rods, the workpiece taking and turning mechanism is provided with a first workbench, and a first linear motion unit is installed on the first workbench, and a second linear motion unit is installed on the first linear motion unit. A left and right moving rodless cylinder, the first up and down moving cylinder is fixedly installed on the first left and right moving rodless cylinder, the telescopic rod end of the first up and down moving cylinder is connected with the first front and rear moving cylinder, The end is connected with the first lifting cylinder, the telescoping rod end of the first lifting cylinder is connected with the first stepping motor, and the first workpiece clamping unit is assembled on the output shaft of the first stepping motor.

In the above-mentioned automatic workpiece conveying device for double-end connecting rod welding, the workpiece conveying mechanism between the welding processes at both ends is provided with a second workbench, and a second linear motion unit is installed on the second workbench, and a second linear motion unit is arranged on the second Two left and right moving rodless cylinders, a second up and down moving cylinder is fixedly installed on the second left and right moving rodless cylinder, the end of the telescopic rod of the second up and down moving cylinder is connected to the second front and rear moving cylinder, and the telescopic rod of the second front and rear moving cylinder is The end is connected with the second lifting cylinder, the end of the telescopic rod of the second lifting cylinder is connected with the second stepping motor, and the second workpiece clamping unit is assembled on the output shaft of the second stepping motor.

In the above-mentioned automatic workpiece conveying device for double-headed connecting rod welding, the workpiece conveying mechanism between the welding and post-processing procedures is provided with a third workbench, and a third linear motion unit is installed on the third workbench, and the third linear motion unit is A third left and right moving rodless cylinder is installed, and a third front and rear moving cylinder is fixedly installed on the third left and right moving rodless cylinder. Connect the third stepper motor, and assemble the third workpiece clamping unit on the output shaft of the third stepper motor.

The above-mentioned automatic conveying device for welding workpieces with double-headed connecting rods, the workpiece lifting and indexing mechanism is matched with the workpiece conveying mechanism between the welding processes at both ends, and it includes a rodless cylinder moving up and down, a fourth stepping motor, a rotating block and a fourth workbench , the up and down moving rodless cylinder is fixed on the fourth workbench, the fourth stepping motor is installed on the side wall of the up and down moving rodless cylinder, and a rotating block is assembled at the end of the output shaft of the fourth stepping motor, and the rotating The block is provided with a groove matching the pin-hole seat of the connecting rod workpiece.

In the above-mentioned automatic conveying device for welding workpieces with double-headed connecting rods, the PLC control system is matched with the control system of welding equipment for connecting rod workpieces, and all the cylinders that cooperate with the actuators of the PLC control system are magnetic ring cylinders.

The invention consists of different linear motion units, cylinders, stepping motors and workpiece clamping units to form a manipulator structure, which replaces the manual completion of the workpiece picking and turning, two welding processes, and transportation between welding and post-processing processes during the welding process of connecting rod workpieces. , reduces the welding time of the connecting rod workpiece, and can complete the entire cycle process within 12 seconds; the invention realizes the movement, indexing, rotation and other actions of the workpiece through PLC system control, and all cylinders use magnetic ring cylinders, Each step has an anti-error device to ensure the consistency of product production. In a word, the present invention has the characteristics of high degree of automation and reliable operation, can effectively reduce the labor intensity of operators, reduce hidden dangers in production safety, and improve product quality and welding production efficiency.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing.

Fig. 1 is a general layout schematic diagram of the present invention;

Fig. 2 is a schematic diagram of the composition and structure of the workpiece taking and turning mechanism;

Figure 3 is a schematic diagram of the composition and structure of the workpiece conveying mechanism between the welding processes at both ends;

Fig. 4 is a schematic diagram of the composition and structure of the workpiece jacking and indexing mechanism;

Fig. 5 is a schematic diagram of the composition and structure of the workpiece conveying mechanism between welding and post-processing procedures;

Fig. 6 is a schematic diagram of the spatial attitude change of the connecting rod workpiece during the welding process.

The labels in the figure are: 1, the workpiece taking and turning mechanism, 1-1, the first workbench, 1-2, the first linear motion unit, 1-3, the first left and right moving rodless cylinder, 1-4, The first up and down moving cylinder, 1-5, the first forward and backward moving cylinder, 1-6, the first stepping motor, 1-7, the first lifting cylinder, 1-8, the first clamping unit, 2, welding process at both ends Between the workpiece conveying mechanism, 2-1, the second workbench, 2-2, the second linear motion unit, 2-3, the second left and right moving rodless cylinder, 2-4, the second up and down moving cylinder, 2-5, The second forward and backward moving cylinder, 2-6, the second stepping motor, 2-7, the second lifting cylinder, 2-8, the second clamping unit, 3, the workpiece conveying mechanism between welding and post-processing procedures, 3-1 , the third workbench, 3-2, the third linear motion unit, 3-3, the third left and right moving rodless cylinder, 3-4, the third front and rear moving cylinder, 3-5, the third stepping motor, 3- 6. The third clamping unit, 3-7, the third lifting cylinder, 4. The workpiece jacking and indexing mechanism, 4-1, the rodless cylinder moving up and down, 4-2, the fourth stepping motor, 4-3, Rotary block, 4-4, the fourth worktable, 4-5, groove, 5, connecting rod workpiece, 5-1, connecting rod workpiece shaft, 5-2, the first pin hole seat of connecting rod, 5-3 , the second pin-hole seat of the connecting rod, 6, the material storage box, 7, the first welding machine, 8, the second welding machine, 9, the conveying device for the pin-hole seat of the connecting rod, 10, the post-processing device (marking device).

Detailed ways

Referring to Fig. 1, the present invention is a matching tooling for the connecting rod workpiece welding equipment, which consists of a workpiece taking and turning mechanism 1, a workpiece conveying mechanism 2 between welding processes at both ends, a workpiece jacking and indexing mechanism 4, and workpieces between welding and post-processing processes Conveying mechanism 3 and PLC control system, wherein the workpiece taking and turning mechanism 1 is arranged between the storage box 6 and the first welding machine 7 of the connecting rod workpiece welding equipment, and is used to complete the workpiece raw material (connecting rod shaft) The adjustment of grasping and spatial posture changes the connecting rod from the original horizontal placement to the vertical placement of both ends of the rod. The workpiece conveying mechanism 2 between the two ends of the welding process is matched with the workpiece jacking and indexing mechanism 4. They are arranged between the first welding machine 7 and the second welding machine 8 of the connecting rod workpiece welding equipment, and are used to complete the connecting rod workpiece. The transportation between the welding process of the first pin-hole seat of the rod and the welding process of the second pin-hole seat of the connecting rod, and the adjustment of the spatial posture of the workpiece is completed during the transportation process (the state at this time is a vertical state, and the welded One end is on the top, you need to adjust the state to turn the welded end 180 degrees, that is, the welded end faces down, and the small hole of the round head seat should also be rotated 180 degrees so that the small hole faces the other end); welding and The post-processing workpiece conveying mechanism 3 is arranged between the second welding machine 8 of the connecting rod workpiece welding equipment and the post-processing device 10, and is used to complete the welding process and post-processing of the connecting rod workpiece on the second pin hole seat of the connecting rod. The transportation between processes, and the adjustment of the workpiece space posture during the transportation process (turning the vertically placed products into parallel ones, in order to get away from the resistance welding machine itself, if it is placed vertically and moves, it will be in contact with the resistance welding machine itself Interference, the next sequence of operations can only be carried out after flipping).

Referring to Figures 1 to 6, the present invention can replace the manual completion of the reclaiming and flipping of the workpiece during the welding process of the connecting rod workpiece, the transportation between the two welding processes, the welding and the post-processing process, and reduces the time spent on welding the connecting rod workpiece. The entire cycle process control is completed within 12 seconds; the present invention realizes the movement, indexing, rotation and other actions of the workpiece through PLC control, and all cylinders use magnetic force ring cylinders (such as SC50X250-S type magnetic force ring cylinders), each step of the action All have anti-error devices to ensure the consistency of product production. This is because of the anti-error function of the magnetic ring, when it is not in place, it will not proceed to the next step to ensure the consistency of the product.

The specific operation steps of the present invention are: 1. Loading the workpiece, pressing the switch button, the first clamping unit of the workpiece taking and turning mechanism 1 grabs the connecting rod shaft at the outlet of the storage box 6 and turns it over 90°, The workpiece 5 changes from a horizontal state to a vertical state, and then is transported to the welding operation area of the first welding machine 7 by the workpiece taking and turning mechanism 1, where the welding of the first connecting rod pin hole seat 5-1 is completed, and the workpiece Take the turning mechanism 1 and return to the initial position; 2. The workpiece is transported between the two welding processes. After the second clamping unit of the workpiece transport mechanism 2 between the two welding processes grabs the workpiece, it is driven by the second stepping motor 2-6 to complete The workpiece rotates 180° in the vertical plane. At this time, the first connecting rod pin hole seat 5-1 of the workpiece is located at the lower end of the workpiece 5. After the adjustment of the workpiece jacking and indexing mechanism, the workpiece 5 completes the 180° rotation in the horizontal plane. The workpiece conveying mechanism 2 between the welding processes is transported to the welding operation area of the second welding machine 8, where the welding of the second connecting rod pin hole seat 5-2 is completed, and the workpiece conveying mechanism 2 between the welding processes at both ends returns to the initial position; 3. Workpiece transportation between welding and post-processing procedures. After the second clamping unit of the workpiece conveying mechanism 3 between welding and post-processing procedures grabs the workpiece, it is driven by the third stepping motor 3-5 to complete the workpiece vertical plane 90 ° rotation, the workpiece is in a horizontal state at this time, and then transported to the work area of the post-processing device 10 by the workpiece conveying mechanism 3 between the welding and post-processing procedures, and the post-processing device 10 (marking device) carries out stamping and marking operations on the workpiece 5. After the welding and post-processing procedures are completed, the workpiece conveying mechanism 3 returns to the initial position, thus completing a workpiece conveying cycle.

The three clamping units of the present invention can adopt HDZ-16-15T-2; its structural feature is that the piston moves back and forth by air, and the piston drives the parallel moving clips to move back and forth through the main shaft to complete the opening and clamping action, parallel Auxiliary tools of various styles can be assembled on the clip to hold products of various shapes.

Claims (2)

1. a bipitch connecting rod welding work pieces automatic conveying device, it is characterized in that, it by workpiece take workpiece conveying mechanism (2) between switching mechanism (1), two welding sequence, workpiece jack-up indexing mechanism (4), between welding and postprocessing working procedures, workpiece conveying mechanism (3) and PLC control system form;

Described workpiece switching mechanism (1) of taking is provided with the first workbench (1-1), at upper installation first linear motion unit (1-2) of the first workbench (1-1);

Between the welding sequence of described two, workpiece conveying mechanism (2) is provided with the second workbench (2-1), at upper installation second linear motion unit (2-2) of the second workbench (2-1);

Between described welding and postprocessing working procedures, workpiece conveying mechanism (3) is provided with the 3rd workbench (3-1), in the upper installation the 3rd linear motion unit (3-2) of the 3rd workbench (3-1);

Described workpiece switching mechanism (1) of taking is arranged between the material storing box (6) of connecting rod workpiece pattern welding equipment and the first welding machine (7), between the welding sequence of described two, workpiece conveying mechanism (2) and workpiece jack-up indexing mechanism (4) are arranged between first welding machine (7) of connecting rod workpiece pattern welding equipment and the second welding machine (8), and between described welding and postprocessing working procedures, workpiece conveying mechanism (3) is arranged between second welding machine (8) of connecting rod workpiece pattern welding equipment and after-treatment device (10);

Described first linear motion unit (1-2) being arranged first moves left and right without bar cylinder (1-3), move left and right first and move up and down cylinder (1-4) without fixedly mounting first above bar cylinder (1-3), the described first expansion link end moving up and down cylinder (1-4) connects the first movable cylinder (1-5), the first lift cylinder (1-7) is connected at the first movable cylinder (1-5) expansion link end, described first lift cylinder (1-7) expansion link end connects the first stepper motor (1-6), first stepper motor (1-6) output shaft assembles the first Workpiece clamping unit (1-8),

Described second linear motion unit (2-2) being arranged second moves left and right without bar cylinder (2-3), move left and right second and move up and down cylinder (2-4) without fixedly mounting second above bar cylinder (2-3), the described second expansion link end moving up and down cylinder (2-4) connects the second movable cylinder (2-5), the second lift cylinder (2-7) is connected at the second movable cylinder (2-5) expansion link end, described second lift cylinder (2-7) expansion link end connects the second stepper motor (2-6), the output shaft of the second stepper motor (2-6) assembles second workpiece clamping unit (2-8),

Described 3rd linear motion unit (3-2) arranges the 3rd to be moved left and right without bar cylinder (3-3), move left and right without fixedly mounting the 3rd movable cylinder (3-4) above bar cylinder (3-3) the 3rd, the 3rd lift cylinder (3-7) is connected at the 3rd movable cylinder (3-4) expansion link end, described 3rd lift cylinder (3-7) expansion link end connects the 3rd stepper motor (3-5), and the output shaft of the 3rd stepper motor (3-5) assembles the 3rd Workpiece clamping unit (3-6);

Described workpiece jack-up indexing mechanism (4) is mated with workpiece conveying mechanism (2) between the welding sequence of two, it comprises and moves up and down without bar cylinder (4-1), 4th stepper motor (4-2), spill spin block (4-3) and the 4th workbench (4-4), described moving up and down is fixed on the 4th workbench (4-4) without bar cylinder (4-1), described 4th stepper motor (4-2) is arranged on the sidewall that moves up and down without bar cylinder (4-1), at the 4th stepper motor (4-2) output shaft end assembling spill spin block (4-3), described spill spin block (4-3) is provided with the groove (4-5) mated with connecting rod workpiece pin-and-hole seat.

2. a kind of bipitch connecting rod welding work pieces automatic conveying device according to claim 1, it is characterized in that, described PLC control system is mated with connecting rod workpiece pattern welding equipment control system, and all cylinders coordinated with PLC control system executive component are magnetic ring cylinder.