Electrofusion pipe fitting electrode tip grabbing and pressing device utilizing elastic force

Abstract

The utility model discloses an electric melting pipe fitting electrode tip grabbing and pressing device utilizing elastic force, which is based on a right-angle three-coordinate manipulator and comprises a three-axis lead screw sliding table module and an electrode tip grabbing and pressing mechanism fixedly arranged on a sliding block of a tail end execution module of the three-axis lead screw sliding table module, the electrode tip grabbing and pressing mechanism comprises an overall fixing frame, a guiding telescopic assembly, a limiting buffer assembly and an elastic pressing grabbing assembly, and the overall fixing frame is connected with a sliding block in the tail end execution module and is driven and controlled by a servo motor to move in the axial direction; the guiding telescopic assembly and the limiting buffer assembly are both fixed to the overall fixing frame, the guiding telescopic assembly controls the elastic pressing grabbing assembly in a telescopic mode, and the elastic pressing grabbing assembly grabs an electrode tip and then presses the electrode tip to an electric smelting pipe fitting. The limiting buffer assembly is arranged on the side of the guiding telescopic assembly to conduct limiting adjustment on the guiding telescopic assembly so as to prevent the situation that the elastic pressing grabbing assembly controlled by the guiding telescopic assembly excessively grabs and presses the electrode tip, and the assembling efficiency is affected.

Description

Technical Field

[0001] The utility model relates to the technical field of production and packaging of PE electric fusion pipe fittings, in particular to a device for grabbing and pressing an electrode head of an electric fusion pipe fitting using elastic force. Background Art

[0002] During the production and packaging process of PE electric fusion pipe fittings, after the injection molding is completed and the resistance wire wiring is completed, two electrode heads need to be pressed on the interface to connect with the resistance wire, and then the subsequent labeling, resistance measurement, binding, electrode cap pressing, packaging and other operations are carried out. However, the existing manual operation mode of pressing the electrode head is low in efficiency and high in labor intensity. In addition, the pressing force cannot be unified, and there is a situation where the electrode head is not pressed in place, which affects the quality of the finished product. Utility Model Content

[0003] In order to solve the above technical problems existing in the prior art, the utility model proposes a device for grabbing and pressing the electrode head of an electric fusion pipe fitting using elastic force, and the specific technical solution is as follows:

[0004] A device for grabbing and pressing the electrode head of an electric fusion pipe fitting using elastic force comprises: a manipulator fixing frame and a right-angle three-coordinate manipulator mounted on the manipulator fixing frame, the right-angle three-coordinate manipulator comprises: a three-axis lead screw slide module and an electrode head grabbing and pressing mechanism fixedly mounted on a slider of an execution module at its end, the electrode head grabbing and pressing mechanism comprises: an overall fixing frame, a grabbing and pressing cylinder, a movable plate, a guide shaft, a guide shaft fixing seat, an elastic grabbing and pressing component and a limit buffer assembly, the overall fixing frame is fixedly mounted on the slider, the grabbing and pressing cylinder is fixedly mounted on the overall fixing frame, the movable plate is connected to the output end of the grabbing and pressing cylinder, the guide shaft fixing seat is mounted on the movable plate, the upper end of the guide shaft is fixedly connected to the guide shaft fixing seat, the lower end of the guide shaft is connected to the elastic grabbing and pressing component, and the limit buffer assembly is located below the movable plate and is set to interfere with its limit.

[0005] Furthermore, the electrode head grasping and pressing mechanism also includes: a linear bearing and a bearing bracket, wherein the linear bearing is fixedly connected to the bearing bracket and sleeved on the outer side of the lower end of the guide shaft, and the bearing bracket is fixed on the overall fixing frame.

[0006] Furthermore, the electrode head grasping and pressing mechanism also includes: a buffer spring, which is sleeved outside the guide shaft and arranged between the guide shaft fixing seat and the linear bearing.

[0007] Furthermore, the limit buffer assembly includes: a hydraulic buffer and a limit bolt. The hydraulic buffer is fixed to the overall fixing frame by two bolts and is elastically extruded with the movable plate. The limit bolt is threadedly connected to the overall fixing frame and is fixed by a second locking bolt using a nut and is set at a limited distance from the movable plate.

[0008] Furthermore, the elastic grabbing and pressing component includes: an alloy grabbing and pressing head, an alloy elastic strip, and a top screw. The alloy grabbing and pressing head includes a front end mouth and a rear end support seat. The support seat is fixedly connected to the lower end of the guide shaft by a thread. A spring-pressing cavity is provided at the mouth, and a top screw hole is provided on the support seat. The alloy elastic strip includes a front end spring-pressing portion and a rear end fixing portion. The front end spring-pressing portion is placed in the spring-pressing cavity and elastically abuts against the inner wall of the spring-pressing cavity, and the rear end fixing portion extends into the top screw hole and is fixed by the top screw.

[0009] Furthermore, the cavity opening of the spring-pressing cavity is located on the top surface of the mouth, and a strip guide opening is opened on the side of the mouth from the cavity opening, and the strip guide opening is extended toward the top screw hole, the gold elastic strip passes into the spring-pressing cavity from the cavity opening and is placed at the strip guide opening, and the front end spring-pressing part is located at the cavity opening of the spring-pressing cavity.

[0010] Furthermore, the three-axis screw slide module includes an X-axis screw slide module, a Y-axis screw slide module and a Z-axis screw slide module which are assembled and connected in sequence. The Z-axis screw slide module is the end execution module, and each screw slide module is composed of a servo motor, a coupling, a ball screw and a slider that are installed in combination.

[0011] Furthermore, a cylinder fixing plate is also provided on the overall fixing frame, and the grabbing and pressing cylinder is fixed on the cylinder fixing plate by connecting with four hexagon socket screws.

[0012] Compared with the prior art, the technical effects of the utility model are:

[0013] The hydraulic buffer and the buffer springs on the left and right sides of the utility model provide buffering for the grabbing and pressing of the electrode head, thereby improving the stability of the grabbing and pressing. The limit bolt provides a limit for the grabbing and pressing of the electrode head to prevent the grabbing and pressing from over-damaging the electric fusion pipe fittings and other mechanisms, thereby improving the accuracy of the grabbing and pressing. The guide mechanism composed of the left and right guide shafts and the left and right linear bearings ensures the reliability of the up and down movement and the accuracy of the positioning of the left and right elastic grabbing and pressing mechanisms, thereby improving the stability of the grabbing and pressing of the electrode head. The alloy grabbing and pressing head and the alloy elastic strip are both made of high-strength alloy and are quenched. They have excellent strength, toughness and wear resistance, thereby improving the reliability and durability of the grabbing and pressing.

[0014] The utility model has novel design and reasonable conception, has the function of automatically grabbing and pressing the electrode head to assemble it on the electric fusion pipe fitting, and has the advantages of simple structure, cost saving, minimal dependence on the environment and convenient operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of a device for grabbing and pressing an electrode head of an electric fusion pipe fitting using elastic force according to the utility model;

[0016] Figure 2 It is a front structural schematic diagram of the electrode head grabbing and pressing mechanism of the utility model device;

[0017] Figure 3 It is a schematic diagram of the assembly structure of the elastic grasping and pressing component of the device of the utility model;

[0018] Figure 4 It is a schematic diagram of the disassembled structure of the elastic grasping and pressing component of the device of the utility model;

[0019] The components in the accompanying drawings are numbered as follows: 1 is a right-angle three-coordinate manipulator, 2 is an overall fixing frame, 3 is a left linear bearing, 4 is a manipulator fixing frame, 5 is an electric fusion pipe fitting, 6 is a limit bolt, 7 is a movable plate, 8 is a cylinder fixing plate, 9 is a grabbing and pressing cylinder, 10 is a left guide shaft fixing seat, 11 is a hydraulic buffer, 12 is a left buffer spring, 13 is a left guide shaft, 14 is a left elastic grabbing and pressing component, 15 is a right elastic grabbing and pressing component, 16 is a right linear bearing, 17 is a right guide shaft, 18 is a right buffer spring, 19 is a right guide shaft fixing seat, 20 is an alloy grabbing and pressing head, 21 is an electrode head, 22 is an alloy elastic strip, 23 is a fixed top screw, and 24 is a bearing bracket. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0021] like Figure 1 and Figure 2As shown, this embodiment discloses a device for grabbing and pressing the electrode head of an electric fusion pipe fitting using elastic force, including: a manipulator fixing frame 4 and a right-angle three-coordinate manipulator 1 installed on the manipulator fixing frame 4, the manipulator fixing frame 4 is made of thickened steel plate and steel pipe cutting, welding and punching, and the right-angle three-coordinate manipulator 1 is connected and fixed on the manipulator fixing frame 4 by 8 hexagon socket screws; the right-angle three-coordinate manipulator 1 includes: a three-axis lead screw slide module and an electrode head grabbing and pressing mechanism connected to it by control, and the electrode head grabbing and pressing mechanism can move in the front, back, left, right, up and down directions. In this embodiment, the three-axis lead screw slide module includes an X-axis lead screw slide module, a Y-axis lead screw slide module and a Z-axis lead screw slide module that are assembled and connected in sequence, and move in space in the directions of the X-axis, Y-axis and Z-axis. The three-axis lead screw slide module is composed of a servo motor, a coupling, a ball screw and a slider that are installed in combination. It can be understood that the lead screw slide module that controls the Z-axis direction is the end execution module.

[0022] The electrode head grasping and pressing mechanism includes: an overall fixed frame 2, a guide telescopic component, a limit buffer component, and a spring-loaded grasping component. The overall fixed frame 2 is connected to the slider in the end execution module and is driven and controlled by a servo motor to perform axial movement; the guide telescopic component and the limit buffer component are both fixed on the overall fixed frame 2, wherein the guide telescopic component is telescopically controlled to be connected to the spring-loaded grasping component, and the spring-loaded grasping component grasps the electrode head and presses it onto the electric fusion pipe fitting; the limit buffer component is configured on the side of the guide telescopic component to perform limit adjustment on it, so as to prevent the spring-loaded grasping component controlled by the guide telescopic component from grasping and pressing the electrode head excessively, thereby affecting the assembly efficiency.

[0023] The overall fixing frame 2 is made of thickened steel plate by cutting, welding and punching, and is fixed to the slider in the end execution module by four hexagonal screws. With the help of the three-axis lead screw slide module, the overall fixing frame 2 can move forward, backward, left, right, up and down.

[0024] The guide telescopic assembly includes: a cylinder fixing plate 8, a grabbing and pressing cylinder 9, a movable plate 7, a left guide shaft fixing seat 10, a right guide shaft fixing seat 19, a left guide shaft 13, a right guide shaft 17, a left buffer spring 12, a right buffer spring 18, a left linear bearing 3, a right linear bearing 16 and a bearing bracket 24.

[0025] The cylinder fixing plate 8 is formed by cutting and punching thickened steel plate, and the cylinder fixing plate 8 is connected and fixed to the overall fixing frame 2 by 4 hexagon socket screws, and the grabbing and pressing cylinder 9 is connected and fixed to the cylinder fixing plate 8 by 4 hexagon socket screws. The movable plate 7 is formed by cutting and punching thickened steel plate, and the movable plate 7 is connected and fixed to the movable block on the output end of the grabbing and pressing cylinder 9 by 2 hexagon socket screws. The left guide shaft fixing seat 10 and the right guide shaft fixing seat 19 are connected and fixed to the movable plate 7 by 4 hexagon socket screws respectively. The upper ends of the left guide shaft 13 and the right guide shaft 17 are respectively inserted into the left guide shaft fixing seat 10 and the right guide shaft fixing seat 19 and are respectively tightened and fixed by 2 screws. The left linear bearing 3 and the right linear bearing 16 are connected and fixed to the bearing bracket 24 by 4 hexagon socket screws, and are respectively sleeved on the outer side of the lower ends of the left guide shaft 13 and the right guide shaft 17, and the bearing bracket 24 is fixedly connected to the overall fixing frame 2. The left-side buffer spring 12 is sleeved outside the left-side guide shaft 13 and is arranged between the left-side guide shaft fixing seat 10 and the left-side linear bearing 3, providing buffering for the grabbing and pressing of the electrode head. The right-side buffer spring 18 is sleeved outside the right-side guide shaft 17 and is arranged between the right-side guide shaft fixing seat 19 and the right-side linear bearing 16, also providing buffering for the grabbing and pressing of the electrode head.

[0026] The limit buffer assembly includes: a hydraulic buffer 11 and a limit bolt 6. The hydraulic buffer 11 and the limit bolt 6 are located below the movable plate 7, and the hydraulic buffer 11 is fixed to the overall fixing frame 2 by two bolts. The hydraulic buffer 11 provides buffering for the grabbing and pressing of the electrode head. The limit bolt 6 is connected to the overall fixing frame 2 by threads and is fixed by a second locking with a nut. The limit bolt 6 provides limiting for the grabbing and pressing of the electrode head.

[0027] like Figure 3 and Figure 4As shown, the spring-pressed grabbing assembly includes: a left elastic grabbing pressing member 14 and a right elastic grabbing pressing member 15, and the left elastic grabbing pressing member 14 and the right elastic grabbing pressing member 15 are respectively fixed to the lower ends of the left guide shaft 13 and the right guide shaft 17 by threaded connection. Specifically, the left elastic grabbing and pressing component 14 and the right elastic grabbing and pressing component 15 both include: an alloy grabbing and pressing head 20, an alloy elastic strip 22, and a top screw 23. The alloy grabbing and pressing head 20 is made of an alloy block by cutting, punching, and grinding, and is quenched to improve its strength and wear resistance. The alloy grabbing and pressing head 20 is provided with a spring-pressing cavity and a top screw hole. The spring-pressing cavity is located at the front end mouth of the alloy grabbing and pressing head 20, and the cavity mouth of the spring-pressing cavity is on the top surface of the mouth. A strip guide opening is opened on the side of the mouth from the cavity mouth, that is, a strip guide opening is opened on the side wall of the spring-pressing cavity, and the strip guide opening is extended toward the top screw hole. The strip guide opening is used to provide space for elastic deformation of the alloy elastic strip 22. The top screw hole is located on the rear end support of the alloy grabbing and pressing head 20, and the top screw 23 is fixed in the top screw hole. The alloy elastic strip 22 is formed by alloy wire and is quenched to increase its strength and wear resistance. After the alloy elastic strip 22 is inserted into the spring-pressure cavity, it is tightened and fixed by the top screw 23. More specifically, the alloy elastic strip 22 is inserted into the spring-pressure cavity from the cavity opening and is placed at the strip guide opening until the front end spring-pressure portion of the alloy elastic strip 22 is located at the cavity opening of the spring-pressure cavity, and the rear end fixing portion of the alloy elastic strip 22 enters the top screw hole and is tightened and fixed by the top screw 23.

[0028] The spring-pressing grasping assembly grasps the electrode head 21, and the electrode head 21 relies on the elastic force of the alloy elastic strip 22 to squeeze it into the spring-pressing cavity of the alloy grasping and pressing head 20, so that the electrode head 21 is grasped and does not fall off through the conversion of elastic force and friction force.

[0029] In summary, the structure of the utility model is composed of a set overall fixed frame 2, a grabbing and pressing cylinder 9, a movable plate 7, a limit buffer component installed on the overall fixed frame 2, a guide telescopic component and a spring-pressing grabbing component controlled by the grabbing and pressing cylinder 9 and assembled through the movable plate 7. The movable plate 7 is fixed on the output end movable block of the grabbing and pressing cylinder 9, and is driven up and down by the grabbing and pressing cylinder 9 to form a practical electric fusion pipe electrode head grabbing and pressing device that utilizes elastic force.

[0030] The specific implementation process of the utility model device in the production process is as follows: first, the entire device is fixed on the electric melting pipe assembly and packaging line through the manipulator fixing frame 4, and then the position of the limit bolt 6 is adjusted to ensure that the electrode head is not over-gripped. Then the device is started, and the right-angle three-coordinate manipulator 1 drives the overall fixing frame 2 of the grabbing and pressing mechanism and the upper left elastic grabbing and pressing mechanism 14 and the right elastic grabbing and pressing mechanism 15 to move to the top of the electrode head delivery tooling. After the front-end vibration plate vibration conveying mechanism delivers the electrode head to the tooling, the grabbing and pressing cylinder 9 is started, and the left guide shaft 13 and the right guide shaft 17 are respectively guided by the left linear bearing 3 and the right linear bearing 16 and the left buffer spring 12 and the right buffer spring 18 and the hydraulic buffer 11 to move downward, driving the left elastic grabbing and pressing mechanism 14 and the right elastic grabbing and pressing mechanism 15 to move downward. Then the electrode head 21 is squeezed and grabbed by the alloy grabbing and pressing head 20 and the alloy elastic strip 22. Next, the grabbing and pressing cylinder 9 moves up and returns to its original position, driving the left elastic grabbing and pressing mechanism 14 and the right elastic grabbing and pressing mechanism 15 as well as the grabbed electrode head to move up together. At the same time, the right-angle three-coordinate manipulator 1 drives the overall fixed frame 2 and the left elastic grabbing and pressing mechanism 14 and the right elastic grabbing and pressing mechanism 15 above it to move above the electric fusion pipe fitting 5. Then, the grabbing and pressing cylinder 9 moves downward under the guidance of the left guide shaft 13 and the right guide shaft 17, the left linear bearing 3 and the right linear bearing 16, and the buffering of the left buffer spring 12 and the right buffer spring 18 and the hydraulic buffer 11, driving the left elastic grabbing and pressing mechanism 14 and the right elastic grabbing and pressing mechanism 15 to move downward, pressing the grabbed electrode head into the interface of the electric fusion pipe 5 to connect it with the resistance wire in the electric fusion pipe 5, and then the grabbing and pressing cylinder 9 moves upward to return to its original position, driving the left elastic grabbing and pressing mechanism 14 and the right elastic grabbing and pressing mechanism 15 to move upward together, and the electrode head 21 is firmly embedded in the electric fusion pipe 5 and detached from the elastic grabbing and pressing member. The device waits for the next electric fusion pipe 5 and the next group of electrode heads 21 to arrive, and prepares for the next grabbing and pressing of the electrode head 21. At this point, the device completes a complete action.

[0031] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present utility model are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly. In the present utility model, unless otherwise clearly specified and limited, the terms "connection", "fixed", etc. should be understood in a broad sense. For example, "fixed" can be a fixed connection, a detachable connection, or an integral whole; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0032] The above is only a preferred implementation case of the utility model, and does not limit the utility model in any form. Although the implementation process of the utility model is described in detail above, for those familiar with the art, they can still modify the technical solutions recorded in the above examples, or replace some of the technical features therein with equivalents. All modifications and equivalent replacements made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A device for grasping and pressing an electrode head of an electric fusion pipe using elastic force, comprising: A manipulator fixed frame (4) and a right-angle three-coordinate manipulator (1) mounted on the manipulator fixed frame (4), the right-angle three-coordinate manipulator (1) comprising: a three-axis lead screw slide module and an electrode head grabbing and pressing mechanism fixedly mounted on a slider of an execution module at its end, characterized in that the electrode head grabbing and pressing mechanism comprises: an overall fixed frame (2), a grabbing and pressing cylinder (9), a movable plate (7), a guide shaft, a guide shaft fixing seat, an elastic grabbing and pressing member and a limit buffer assembly, the overall fixed frame (2) is fixedly mounted on the slider, the grabbing and pressing cylinder (9) is fixedly mounted on the overall fixed frame (2), the movable plate (7) is connected to the output end of the grabbing and pressing cylinder (9), the guide shaft fixing seat is mounted on the movable plate (7), the upper end of the guide shaft is fixedly connected to the guide shaft fixing seat, the lower end of the guide shaft is connected to the elastic grabbing and pressing member, and the limit buffer assembly is located below the movable plate (7) and is arranged to be in contact with the movable plate.

2. The device for grabbing and pressing the electrode head of an electric fusion pipe using elastic force as claimed in claim 1, characterized in that: The electrode head grasping and pressing mechanism further comprises: a linear bearing and a bearing bracket (24); the linear bearing is fixedly connected to the bearing bracket (24) and sleeved on the outer side of the lower end of the guide shaft; and the bearing bracket (24) is fixed to the overall fixing frame (2).

3. The device for grabbing and pressing the electrode head of an electric fusion pipe using elastic force as claimed in claim 2, characterized in that: The electrode head grabbing and pressing mechanism also includes: a buffer spring, which is sleeved outside the guide shaft and arranged between the guide shaft fixing seat and the linear bearing.

4. The device for grabbing and pressing the electrode head of an electric fusion pipe using elastic force as claimed in claim 1, characterized in that: The limit buffer assembly comprises: a hydraulic buffer (11) and a limit bolt (6); the hydraulic buffer (11) is locked and fixed to the overall fixing frame (2) by two bolts, and is elastically pressed against the movable plate (7); the limit bolt (6) is threadedly connected to the overall fixing frame (2) and is locked and fixed for a second time by a nut, and is set at a limited distance from the movable plate (7).

5. The device for grabbing and pressing the electrode head of an electric fusion pipe using elastic force as claimed in claim 1, characterized in that: The elastic grasping and pressing component comprises: an alloy grasping and pressing head (20), an alloy elastic strip (22), and a top screw (23). The alloy grasping and pressing head (20) comprises a front end mouth and a rear end bracket, the bracket is fixedly connected to the lower end of the guide shaft by means of a thread, a spring cavity is provided at the mouth, and a top screw hole is provided on the bracket. The alloy elastic strip (22) comprises a front end spring portion and a rear end fixing portion, the front end spring portion is placed in the spring cavity and elastically abuts against the inner wall of the spring cavity, and the rear end fixing portion extends into the top screw hole and is fixed by means of the top screw (23).

6. The device for grasping and pressing the electrode head of an electric fusion pipe using elastic force as claimed in claim 5, characterized in that: The cavity opening of the spring-pressing cavity is located at the top surface of the mouth, and a strip guide opening is opened on the side of the mouth from the cavity opening, and the strip guide opening is extended toward the top screw hole. The gold elastic strip (22) penetrates into the spring-pressing cavity from the cavity opening and is placed at the strip guide opening. The front end spring-pressing part is located at the cavity opening of the spring-pressing cavity.

7. The device for grabbing and pressing the electrode head of an electric fusion pipe using elastic force as claimed in claim 1, characterized in that: The three-axis screw slide module includes an X-axis screw slide module, a Y-axis screw slide module and a Z-axis screw slide module which are assembled and connected in sequence. The Z-axis screw slide module is the end execution module. Each screw slide module is composed of a servo motor, a coupling, a ball screw and a slider that are installed in combination.

8. The device for grabbing and pressing the electrode head of an electric fusion pipe using elastic force as claimed in claim 1, characterized in that: The overall fixing frame (2) is also provided with a cylinder fixing plate (8), and the grabbing and pressing cylinder (9) is connected and fixed to the cylinder fixing plate (8) via four hexagon socket screws.

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