Automatic feeding, positioning and welding mechanism for square nuts

Abstract

The utility model relates to the technical field of machining, in particular to an automatic feeding, positioning and welding mechanism for square nuts, the automatic feeding, positioning and welding mechanism comprises a nail feeding mechanism, a lower electrode positioning pin and a limiting mechanism, and the nail feeding mechanism comprises a pushing part, a feeding and receiving head, an ejection box and a limiting baffle. The pushing component comprises a pushing chuck, a moving shaft and a nail feeding gun head, the limiting mechanism comprises a floating limiting block, the square nut is limited through cooperation of the pushing chuck, the floating limiting block and a lower electrode positioning pin, and the problem of the nut angle during automatic welding of the square nut is solved.

Description

Technical Field

[0001] The present invention relates to the field of mechanical processing technology, and in particular to an automatic feeding positioning welding mechanism for square nuts. Background Art

[0002] With the rapid development of the automobile manufacturing industry, the components of automobiles are also becoming more diversified and complex. Parts need to be welded with various types of standard parts and delivered in small assemblies. Affected by the trend of automated production, the current welding process is generally produced using automated equipment. The welding of some standard parts not only needs to ensure the welding quality, but also the welding angle of the nut. An automatic feeding and positioning welding mechanism for square nuts solves this problem just right.

[0003] In the past, when manual welding was used, employees manually placed raw materials and nuts. The relative angle between the nut and the part can be ensured by manual adjustment intervention before welding. The disadvantage of this situation is that a large number of parts need to be wasted to train employees' familiarity. To ensure the angle between the nut and the part, there is a certain defective rate in manual operation of employees. After production is completed, the quality inspector needs to conduct a full inspection before delivery. The process cycle is too long and the production efficiency is low. In addition, manual welding has no personnel protection function and there are safety risks. When employees operate frequently, this probability will increase greatly. In the case of automation, the nut feeding mechanism on the market can generally only ensure that the nut is sent to the specified position through the nail gun, but cannot ensure the angle between the nut and the part. An automatic feeding and positioning welding mechanism for square nuts ensures the cycle and meets production needs while meeting the angle requirements.

[0004] The present application provides a method of correcting the angle of the nuts sent out by the nut machine by mechanical limiting, and uses the nail feeding mechanism, the lower electrode positioning pin and the limiting mechanism to work together to fix the angle and position of the square nut, thereby solving the welding angle problem of the square nut. Utility Model Content

[0005] The purpose of the utility model is to overcome the shortcomings of the above-mentioned prior art and provide an automatic feeding positioning welding mechanism for square nuts.

[0006] In order to achieve the above-mentioned purpose, the utility model has the following structure:

[0007] An automatic feeding positioning welding machine for square nuts comprises a nail feeding mechanism, a lower electrode positioning pin and a limiting mechanism.

[0008] The nail feeding mechanism comprises a pushing component, and the pushing component comprises a pushing clamp, a moving shaft and a nail feeding gun head.

[0009] The nail feeding gun head and the pushing chuck are slidably arranged on the moving shaft, the nail feeding gun head is connected to the pushing chuck, and the outer diameter of the nail feeding gun head is smaller than the inner hole diameter of the square nut.

[0010] The pushing chuck comprises two chuck plates, and the distance between the two chuck plates is greater than the side length of a single square nut and less than the diagonal length of the single square nut.

[0011] The limiting mechanism comprises a floating limiting block which can be telescopically moved and contact the square nut. The floating limiting block cooperates with the lower electrode positioning pin embedded in the inner hole of the square nut to adjust the square nut to the welding position and angle.

[0012] In the automatic feeding and positioning welding mechanism for square nuts, the nail feeding mechanism also includes a feeding head, an ejection box and a limit baffle; the feeding head is a hollow container, the top and bottom of the feeding head are open structures, the top of the feeding head is connected to the external mechanism nut material channel, and the square nut falls from the top opening of the feeding head to the feeding head.

[0013] In the automatic feeding and positioning welding mechanism for square nuts, the ejection box is a hollow container, the top of the ejection box is provided with an opening, the top opening is connected with the bottom opening of the feeding head, the square nut falls into the ejection box through the top opening of the ejection box, the front end face and the rear end face of the ejection box are both provided with openings, and the pushing component is stored in the ejection box.

[0014] In the automatic feeding and positioning welding mechanism for square nuts, the limit baffle is movably connected to the ejection box, and the limit baffle can be in a closed position or an open position. When in the closed position, the limit baffle is located at the front end face opening of the material delivery head, so that the front end face opening of the material delivery head is in a blocking state, preventing the square nut from flying out of the ejection box; when in the open position, the limit baffle leaves the front end face opening of the material delivery head, and the front end face of the material delivery head resumes the open state. After receiving the welding signal, the pushing component extends out of the ejection box, and the inner hole of the square nut placed in the ejection box is embedded in the nail feeding gun head, and the square nut is pushed onto the lower electrode positioning pin together with the pushing component, and the positioning pin is embedded in the inner hole of the square nut.

[0015] In the automatic feeding positioning welding mechanism for square nuts, the limiting mechanism also includes a supporting positioning frame and a stroke cylinder; the stroke cylinder is arranged on the supporting positioning frame, and the floating limiting block is connected to the piston rod on the stroke cylinder. When the stroke cylinder is working, the piston rod extends to drive the floating limiting block to move.

[0016] In the automatic feeding positioning welding mechanism for square nuts, the stroke cylinder is horizontally arranged on the supporting positioning frame.

[0017] In the automatic feeding positioning welding mechanism for square nuts, the floating limit block is a rectangular structure.

[0018] In the automatic feeding and positioning welding mechanism for square nuts, the feeding and receiving head is a hollow container with a cubic structure.

[0019] In the automatic feeding and positioning welding mechanism for square nuts, the width of the bottom opening of the feeding and receiving head is greater than the length of the diagonal of a single nut and less than twice the side length of a single square nut.

[0020] In the automatic feeding positioning welding mechanism for square nuts, the width of the top opening of the ejection box is greater than the length of the diagonal of a single nut and less than twice the side length of a single square nut.

[0021] In the automatic feeding positioning welding mechanism for square nuts, the limit baffle is an L-shaped plate, and the short side of the L-shaped plate is connected to the ejection box through a hinge device.

[0022] In the automatic feeding positioning welding mechanism for square nuts, the hinge device is equipped with a spring mechanism. When the pushing component is retracted into the ejection box, the spring mechanism restores the limit baffle from the open position to the closed position.

[0023] In the automatic feeding positioning welding mechanism for square nuts, the number of the piston rods is two, the center plane is a plane passing through the midpoints of the short sides of the floating limit block and perpendicular to the floating limit block, and the two piston rods are arranged in mirror symmetry according to the center plane.

[0024] The utility model adopts an automatic feeding positioning welding mechanism for square nuts, which includes a feeding mechanism, a lower electrode positioning pin and a limiting mechanism; the feeding mechanism includes a pushing component, and the pushing component includes a pushing chuck, a moving shaft and a feeding gun head; the feeding gun head and the pushing chuck are slidably arranged on the moving shaft, the feeding gun head is connected to the pushing chuck, and the outer diameter of the feeding gun head is smaller than the inner hole diameter of the square nut; the pushing chuck includes two chuck plates, and the distance between the two chuck plates is greater than the side length of a single square nut and less than the diagonal length of a single square nut; the pushing component sends the square nut to the lower electrode positioning pin, and the lower electrode positioning pin is embedded in the inner hole of the square nut; the limiting mechanism includes a floating limiting block, which can be telescopically moved and contacted with the square nut, and the angle when welding the square nut is solved by the cooperation of the lower electrode positioning pin and the floating limiting block. The present application solves the problem of automatic welding of square nuts and ensures the advantage of the angle between the nut and the part. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a structural schematic diagram of the nail feeding mechanism of the present application;

[0026] Figure 2 This is a schematic diagram of the structure of the limiting mechanism of this application;

[0027] Figure 3 This is a schematic assembly diagram of an automatic feeding and positioning welding mechanism for square nuts of the present application;

[0028] Figure 4 It is a cross-sectional structural diagram of the ejection box and the material delivery head of the present application;

[0029] Explanation of symbols: 1 nail gun head, 2 push chuck, 3 moving shaft, 4 material delivery head, 5 limit baffle, 6 ejection box, 7 support positioning frame, 8 stroke cylinder, 9 piston rod, 10 floating limit block, 11 lower electrode positioning pin. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present disclosure will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work also fall within the scope of protection of the present utility model.

[0031] As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "a kind" and / or "the" do not specifically refer to the singular, but may also include the plural. "First" and "second" are not qualifiers, but are only for explanation to facilitate understanding of the technical solution of the utility model. The contents involved in "first" and "second" can be interchangeable. Generally speaking, the terms "including" and "comprising" only indicate that the steps and elements that have been clearly identified are included, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0032] Unless otherwise specifically stated, the components, relative arrangements, functions, and numerical values ​​described in these embodiments do not limit the scope of the utility model. At the same time, it is obvious that for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods, and equipment known to ordinary technicians in the relevant fields are not described in detail for the time being, but where appropriate, the techniques, methods, and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of step-by-step embodiments may have different sequences.

[0033] The square nut involved in this application refers to a square nut.

[0034] like Figure 1-3 The present application relates to an automatic feeding positioning welding mechanism for square nuts, which includes a nail feeding mechanism, a lower electrode positioning pin 11 and a limiting mechanism. The nail feeding mechanism includes a pushing component, which includes a pushing chuck 2, a moving shaft 3 and a nail feeding gun head 1. The nail feeding gun head and the pushing chuck 2 are slidably arranged on the moving shaft 3, and the nail feeding gun head 1 is connected to the pushing chuck 2, and the outer diameter of the nail feeding gun head 1 is smaller than the inner hole diameter of the square nut. The pushing chuck 2 includes two chuck plates, and the distance between the two chuck plates is greater than the side length of a single square nut and less than the diagonal length of a single square nut. The pushing component sends the square nut to the lower electrode positioning pin 11. At the same time, the lower electrode positioning pin 11 is embedded in the inner hole of the square nut. The limiting mechanism includes a floating limiting block 10, which can be telescopically moved and contacted with the square nut, and the angle when welding the square nut is solved by the cooperation of the lower electrode positioning pin 11 and the floating limiting block 10.

[0035] Further, such as Figure 1As shown, in the automatic feeding and positioning welding mechanism for square nuts, the feeding mechanism also includes a feeding head 4, an ejection box 6 and a limit baffle 5. The feeding head 4 is a hollow container, and the top and bottom of the feeding head 4 are open structures. The top of the feeding head 4 is connected to the external mechanism nut material channel, and the square nut falls from the top opening of the feeding head 4 to the feeding head 4.

[0036] Further, such as Figure 1 As shown, in the automatic feeding positioning welding mechanism for square nuts, the ejection box 6 is a hollow container, an opening is set at the top of the ejection box 6, the opening at the top is connected to the bottom opening of the feeding head 4, the square nut falls into the ejection box 6 through the top opening of the ejection box 6, the front end face and the rear end face of the ejection box 6 are both set with openings, and the pushing component is stored in the ejection box 6.

[0037] Further, such as Figure 1 As shown, in the automatic feeding positioning welding mechanism for square nuts, the limit baffle 5 is movably connected to the ejection box 6, and the limit baffle 5 can be in a closed position or an open position. When in the closed position, the limit baffle 5 is located at the front end face opening of the delivery head 4, so that the front end face opening of the delivery head 4 is in a blocking state, preventing the square nut from flying out of the ejection box 6; when in the open position, the limit baffle 5 leaves the front end face opening of the delivery head 4, and the front end face of the delivery head 4 resumes the open state.

[0038] After receiving the welding signal, Figure 1 and Figure 3 As shown, the pushing component extends out from the ejection box 6, and the nail gun head 1 is embedded in the inner hole of the square nut placed in the ejection box 6 and pushed out to the lower electrode positioning pin 11, which is embedded in the inner hole of the square nut.

[0039] Further, such as Figure 1 As shown, in the automatic feeding positioning welding mechanism for square nuts, the limit baffle 5 is an L-shaped plate, and the short side of the L-shaped plate is connected to the ejection box 6 through a hinge device.

[0040] Further, such as Figure 1 As shown, a spring mechanism is provided on the hinge device, and the function of the spring mechanism is that when the pushing component retracts the ejection box 6, the limit baffle 5 returns to the closed position under the action of the spring mechanism.

[0041] Further, such as Figure 2 and Figure 3As shown, the stroke cylinder 8 can be horizontally arranged on the supporting and positioning frame 7, and the floating limit block 10 extends horizontally to a preset position.

[0042] Further, such as Figure 2 and Figure 3 As shown, the floating limit block 10 is a rectangular structure.

[0043] Further, such as Figure 1 As shown, the material delivery head 4 is a hollow container with a cubic structure.

[0044] Further, such as Figure 4 As shown, in order to better ensure that the number of square nuts falling into the ejection box 6 is one, the width of the bottom opening of the delivery head 4 and the top opening of the ejection box 6 is greater than the length of the diagonal of a single nut and less than twice the side length of a single square nut.

[0045] Further, such as Figure 2 As shown, the number of the piston rods 9 is two, the center plane is a plane passing through the midpoints of the short sides of the floating limit block 10 and perpendicular to the floating limit block 10, and the two piston rods 9 are arranged in mirror symmetry according to the center plane.

[0046] Furthermore, the automatic feeding and positioning welding mechanism for square nuts can also be used for rectangular nuts. The feeding head 4 and the pushing chuck 2 are replaceable. By adjusting the opening width at the bottom of the feeding head 4 and the top of the ejection box 6 and adjusting the distance between the two chuck plates, it is suitable for automatic welding of rectangular nuts.

[0047] like Figure 1 and Figure 4 As shown, when an automatic feeding mechanism for square nuts involved in the present application is working, the vibration plate of the square nut vibrates the square nut, and the square nut is fed into the feeding head 4 along the material channel. The feeding head 4 is a hollow container with openings on the bottom and the top. An opening is provided at the top of the ejection box 6, and the top opening of the ejection box 6 is connected with the bottom opening of the feeding head 4. The square nut falls from the opening at the top of the ejection box 6 into the ejection box 6. The width range of the opening at the top of the ejection box 6 and the bottom opening of the feeding head 4 is greater than the length of the diagonal of a single nut and less than twice the side length of a single square nut. The width limit is set to ensure that only one square nut falls into the ejection box 6.

[0048] like Figure 4As shown, the push chucks 2 of the push component stored in the ejection box 6 are respectively nested in the ejection box 6, and through the cooperation of the nail feeding gun head 1, it is ensured that the inner hole of the square nut dropped into the ejection box faces the nail feeding gun head 1. The push component with this structure can greatly improve the success rate of sending out the square nut on the one hand, and on the other hand, it can ensure that the push component does not turn over in the storage box 6.

[0049] like Figure 1 and Figure 4 As shown, the front and rear end surfaces of the ejection box 6 are provided with openings, and the limit baffle 5 is movably provided on the ejection box 6. The limit baffle 5 has two states: open and closed. When the limit baffle 5 is in the closed state, the limit baffle 5 is located at the front end opening of the ejection box 6 to prevent the square nut in the ejection box from flying out. When the limit baffle 5 is in the open state, the limit baffle 5 leaves the front end opening of the ejection box 6, and the front end surface of the ejection box 6 returns to the open state. When the limit baffle 5 is in the closed state, the pushing component is stored in the ejection box 6.

[0050] like Figure 1 As shown, after receiving the signal of feeding the nut, the nail gun head 1 starts and extends the ejection box 6 along the movable axis 3. In the process of pushing the component to extend the ejection box 6, the nail gun head 1 is embedded in the inner hole of the square nut and punches open the limit baffle 5. At this time, the two side chucks of the pushing limit chuck 2 contact the outer shape of the square nut to preliminarily limit the angle of the nut.

[0051] like Figure 3 As shown, the square nut is pushed out of the feeding head 4 and sent to the lower electrode positioning pin 11. At this time, the lower electrode positioning pin 11 is embedded in the hole of the square nut. When the front sensor of the nail feeding gun head 1 lights up, the nail feeding gun head 1 retracts until the end sensor lights up, the pushing component resets, and the nail feeding ends.

[0052] like Figure 2 and Figure 3 As shown, the limit mechanism is activated at this time, and the stroke cylinder 8 on the support and positioning frame 7 receives the PLC signal and starts to move forward. Driven by the stroke cylinder 8, the floating limit block 10 contacts the square nut and pushes the square nut toward the stroke cylinder 8. The lower electrode positioning pin 11 embedded in the inner hole of the square nut is used as the limit point, and the floating limit block 10 is pushed to further limit and adjust the welding position and angle of the square nut. When the sensor at the front end of the stroke cylinder 8 lights up, the limit mechanism moves into place.

[0053] like Figure 3As shown, after the front sensor lights up and receives the signal, the welder starts, and the welding upper arm moves downward. First, the upper electrode positioning pin is inserted into the nut hole to calibrate the concentricity between the nut and the welding hole to ensure the welding quality. After it is in place, the upper electrode presses the nut to fix the final position. After the PLC receives the in-place signal from the upper electrode arm in-place sensor, the limit mechanism moves again, and the floating limit block 10 retracts under the drive of the stroke cylinder 8. Wait until the end sensor of the stroke cylinder 8 lights up. The automatic nail feeding ends, and the welder welds.

[0054] The automatic feeding positioning welding mechanism of the present application can correct the welding angle of the square nut during automatic welding by limiting the welding angle twice, thereby solving the angle problem during automatic welding of the square nut and improving the efficiency of automatic welding. For the initial limitation, the distance between the two clips of the pushing chuck 2 is first used to limit the angle of the square nut embedded therein, and the welding angle of the square nut is preliminarily limited while the square nut is pushed to the lower electrode positioning pin 11. At this time, the lower electrode positioning pin 11 is embedded in the inner hole of the square nut. For further limitation, the contact point of the lower electrode positioning pin 11 with the inner hole of the square nut is used as a fulcrum, and the welding angle of the square nut is further limited by the push cooperation of the floating limit block 10.

[0055] The above is an explanation of the utility model and should not be considered as a limitation thereof. Although several exemplary embodiments of the utility model are described, it will be easily understood by those skilled in the art that many modifications can be made to the exemplary embodiments without departing from the technical features of the utility model. Therefore, all these modifications are intended to be included in the scope of the utility model as defined in the claims. It should be understood that the above is an explanation of the utility model and should not be considered to be limited to the specific embodiments disclosed, and modifications to the disclosed embodiments and other embodiments are intended to be included in the scope of the attached claims. The utility model is defined by the claims and their equivalents.

Claims

1. An automatic feeding positioning welding mechanism for square nuts, characterized in that: It includes a nail feeding mechanism, a lower electrode positioning pin and a limiting mechanism; The nail feeding mechanism comprises a pushing component, and the pushing component comprises a pushing chuck, a moving shaft and a nail feeding gun head; The nail feeding gun head and the pushing chuck are slidably arranged on the moving shaft, the nail feeding gun head is connected to the pushing chuck, and the outer diameter of the nail feeding gun head is smaller than the inner hole diameter of the square nut; The pushing chuck comprises two chuck plates, and the distance between the two chuck plates is greater than the side length of a single square nut and less than the diagonal length of a single square nut; The pushing component pushes the square nut to the lower electrode positioning pin, and the lower electrode positioning pin is embedded in the inner hole of the square nut; The limiting mechanism comprises a floating limiting block which can be telescopically moved and contact the square nut. The floating limiting block cooperates with the lower electrode positioning pin embedded in the inner hole of the square nut to adjust the square nut to the welding position and angle.

2. An automatic feeding and positioning welding mechanism for square nuts as claimed in claim 1, characterized in that: The nail feeding mechanism also includes a material feeding head, an ejection box and a limit baffle; The material delivery head is a hollow container, the top and bottom of the material delivery head are open structures, and the top of the material delivery head is connected to the external mechanism nut material channel; The ejection box is a hollow container, and an opening structure is arranged on the top of the ejection box, and the opening on the top of the ejection box is connected with the bottom opening of the delivery head; The front end of the ejection box is provided with an opening, and the limit baffle is movably connected to the ejection box; The limit baffle can be in a closed position or an open position. When in the closed position, the limit baffle is located at the opening of the front end surface of the material delivery head, so that the opening of the front end surface of the material delivery head is in a blocking state, preventing the square nut from flying out; When in the open position, the limit baffle leaves the front end surface of the material delivery head, and the front end surface of the material delivery head returns to the open state.

3. An automatic feeding and positioning welding mechanism for square nuts as claimed in claim 2, characterized in that: The limiting mechanism also includes a supporting positioning frame and a travel cylinder; The stroke cylinder is arranged on the supporting and positioning frame, and the floating limit block is connected to the piston rod on the stroke cylinder. When the stroke cylinder is working, the piston rod extends to drive the floating limit block to move.

4. An automatic feeding positioning welding mechanism for square nuts as claimed in claim 3, characterized in that: The stroke cylinder is horizontally arranged on the supporting and positioning frame.

5. An automatic feeding and positioning welding mechanism for square nuts as claimed in claim 4, characterized in that: The floating limit block is a rectangular structure.

6. An automatic feeding and positioning welding mechanism for square nuts as claimed in claim 5, characterized in that: The material delivery and receiving head is a hollow container with a cubic structure.

7. An automatic feeding and positioning welding mechanism for square nuts as claimed in claim 6, characterized in that: The width of the bottom opening of the delivery head and the top opening of the ejection box is greater than the length of the diagonal of a single square nut and less than twice the side length of a single square nut.

8. An automatic feeding and positioning welding mechanism for square nuts as claimed in claim 7, characterized in that: The limit baffle is an L-shaped plate in cross section, and the short side of the L-shaped plate is connected to the ejection box through a hinge device.

9. An automatic feeding positioning welding mechanism for square nuts as claimed in claim 8, characterized in that: The number of the piston rods is two, the center plane is a plane passing through the midpoints of the short sides of the floating limit block and perpendicular to the floating limit block, and the two piston rods are arranged in mirror symmetry with respect to the center plane.

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