Elbow forming device

Abstract

The utility model discloses an elbow forming device, and relates to the technical field of elbow production. Comprising an auxiliary core head, a push-bending core head and a mold with a cavity, the mold is provided with a first opening and a second opening, the push-bending core head is arranged at the first opening and can enter the cavity from the first opening, and the auxiliary core head is arranged at the second opening and can enter the cavity from the second opening. The elastic body is arranged in the blank, a pressure sensor is arranged on the auxiliary core head, and the pressure sensor is connected with a controller capable of controlling the auxiliary core head to advance or retreat. The utility model provides an elbow forming device which ensures internal pressure, ensures that a product does not deform, and ensures that the product does not sink in the forming process.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe bending production, in particular to an elbow forming device. Background Art

[0002] Tube push bending is a bending method that pushes a tube blank filled with filler into a bending mold to form it. It is commonly used for small R elbow forming. The existing push bending method is to cut the elbow pipe blank so that the two ends of the blank are beveled, and the long section of the elbow pipe blank is the outer arc length of the required elbow pipe finished product, and the short section of the elbow pipe blank is the inner arc length of the required elbow pipe finished product, and then put the elbow pipe blank into the mold for pipe pushing to obtain the finished product.

[0003] For example, the Chinese patent publication number CN102319783A, entitled "A hot push bending production method for equal diameter and equal wall thickness pipe fittings", provides a push bending production method, cutting the elbow pipe blank, making the two ends of the elbow pipe blank into an oblique shape, and making the long section length of the elbow pipe blank the required outer arc length of the finished elbow pipe fitting, and the short section length of the elbow pipe blank the required inner arc length of the finished elbow pipe fitting; the elbow pipe blank is placed in the hot push bending device for equal diameter and equal wall thickness pipe fittings to push the pipe fittings, and the equal diameter and equal wall thickness pipe fittings are obtained. The disadvantage is that the internal pressure cannot be ensured, the product cannot be deformed, the blank cannot be guaranteed to be completely consistent with the mold cavity size, and the product is prone to dents during the molding process. Utility Model Content

[0004] In view of the shortcomings of existing elbow forming that cannot ensure internal pressure and cannot ensure that the blank is completely consistent with the mold cavity, the purpose of the utility model is to provide an elbow forming device to ensure internal pressure, ensure that the product is not deformed, and the product is not dented during the forming process.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an elbow forming device, comprising an auxiliary core head, a push-bending core head and a mold with a cavity, the mold being provided with a first opening and a second opening, the push-bending core head being arranged at the first opening and being able to enter the cavity from the first opening, the auxiliary core head being arranged at the second opening and being able to enter the cavity from the second opening, and also comprising an elastomer arranged inside the blank, the auxiliary core head being provided with a pressure sensor, and the pressure sensor being connected to a controller capable of controlling the auxiliary core head to advance or retreat.

[0006] In this technical solution, the elastomer is an elastic block, which is placed inside the blank before it is placed in the mold. On the one hand, it supports internal deformation during the molding process, and on the other hand, it can transmit pressure so that the auxiliary core head cylinder receives the internal pressure. The blank is put into the mold together with an elastic block of suitable size. After the mold is closed, the auxiliary core head enters the mold from the second opening and advances to the specified position. The push-bending core head enters the mold from the first opening and advances to extrude the blank. When the pressure sensor on the auxiliary core head reaches the set pressure value, it gives an electrical signal to the controller. The controller controls the auxiliary core head to retreat. At this time, the push-bending core head keeps advancing to extrude the blank. The blank is in the cavity of the mold. Under the joint action of the two core heads and the elastic block, an elbow-shaped blank is formed. The blank is consistent with the cavity size of the mold. Later, it can be directly expanded into an elbow product of the required size. On the basis of the ordinary push-bending process, an elastic medium is added inside, and the internal molding pressure is controlled by a pressure sensor to ensure that the internal pressure meets the pipe deformation and the product is not concave during the molding process. The small R elbow molding with a diameter of more than 60mm can be realized, which is simpler, faster and saves processes than traditional processes such as press bending and steel ball bending.

[0007] The utility model is further configured such that the orientation of the first opening is perpendicular to the orientation of the second opening. Through this configuration, the blank is formed into an elbow-shaped blank in the mold cavity, and the blank and the mold cavity have the same size.

[0008] The utility model is further configured as follows: the mold cavity includes a first mold cavity, a second mold cavity and a third mold cavity arranged between the first mold cavity and the second mold cavity, the first opening is arranged at one end of the first mold cavity, the second opening is arranged at one end of the second mold cavity, and the length of the first mold cavity is greater than the length of the second mold cavity. The blank enters the first mold cavity of the mold from the first opening, enters the second mold cavity through the third mold cavity, and leaves the mold from the second opening of the second mold cavity. The longer length of the first mold cavity facilitates the molding of the blank.

[0009] The utility model is further configured as follows: the push-bending core head is connected to a controller. The controller can control not only the forward and backward movement of the auxiliary core head, but also the forward and backward movement of the push-bending core head.

[0010] The utility model is further configured as follows: the mold is fixedly arranged relative to the ground. Through this arrangement, during the movement of the bending core head, the auxiliary core head and the blank, the mold will not move therewith.

[0011] The utility model is further configured such that: the head size of the push-bending core head is smaller than the size of the first opening. Through this configuration, it is convenient to insert the push-bending core head into the mold through the first opening, so that the push-bending core head can contact and squeeze the blank.

[0012] The utility model is further configured such that the head size of the auxiliary core head is smaller than the size of the second opening. Through this configuration, it is convenient to insert the auxiliary core head into the mold through the second opening, so that the auxiliary core head can freely move forward or backward in the mold cavity.

[0013] The utility model is further configured as follows: both ends of the blank are beveled, one side of the blank is a long section, and the other side of the blank is a short section. Both ends of the pipe fitting blank are beveled, and the length of the long section of the blank is the outer arc length of the elbow pipe fitting product to be produced, and the length of the short section of the elbow pipe fitting blank is the inner arc length of the elbow pipe fitting product to be produced.

[0014] The advantages of the utility model are: (1) ensuring internal pressure to ensure that the product is not deformed and the product is not dented during the molding process; (2) under the joint action of the auxiliary core head, the push-bending core head and the elastic block, an elbow-shaped blank is formed, and the blank is consistent with the cavity size of the mold, and can be directly expanded and processed into an elbow product of the required size in the later stage; (3) during the movement of the push-bending core head, the auxiliary core head and the blank, the mold will not move accordingly. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a structural schematic diagram of the mold in the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the blank in the utility model;

[0018] Figure 4 It is a structural schematic diagram of the product after molding in the utility model.

[0019] Figure numerals: mold 100, first opening 110, second opening 120, cavity 130, first cavity 131, second cavity 132, third cavity 133, push-bending core head 200, auxiliary core head 300, elastomer 400, blank 500, bevel 510, long section 520, short section 530, product 600, inclined surface 610. DETAILED DESCRIPTION

[0020] In the description of this embodiment, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "back", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore, cannot be understood as a limitation on the utility model. In addition, if the terms "first", "second", and "third" appear, they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0021] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0022] In one embodiment of the present invention, an elbow forming device, referring to Figure 1 , Figure 2 and Figure 3 , including an auxiliary core head 300, a push-bending core head 200, a mold 100 with a cavity 130 and an elastomer 400 arranged inside the blank 500, the mold 100 is provided with a first opening 110 and a second opening 120, the push-bending core head 200 is arranged at the first opening 110 and can enter the cavity 130 from the first opening 110, the auxiliary core head 300 is arranged at the second opening 120 and can enter the cavity 130 from the second opening 120, the auxiliary core head 300 is provided with a pressure sensor, and the pressure sensor is connected to a controller that can control the auxiliary core head 300 to move forward or backward.

[0023] In this embodiment, the elastomer 400 is an elastic block. Before the blank 500 is placed in the mold 100, the elastic block is placed inside the blank 500. On the one hand, it supports internal deformation during the molding process, and on the other hand, it can transmit pressure so that the auxiliary core head 300 cylinder receives the internal pressure. The blank 500 is placed into the mold 100 together with an elastic block of appropriate size. After the mold is closed, the auxiliary core head 300 enters the mold 100 from the second opening 120 and moves forward to the specified position. The push-bend core head 200 enters the mold 100 from the first opening 110 and moves forward to extrude the blank 500. When the pressure sensor on the auxiliary core head 300 reaches the set pressure value, it sends an electrical signal to the controller, and the controller controls the auxiliary core head 300 to retreat. At this time, the push-bend core head 200 keeps moving forward to extrude the blank 500. The blank 500 is in the cavity 1 of the mold 100. 30, under the joint action of the two core heads and the elastic block, an elbow-shaped blank 500 is formed. The blank 500 is consistent in size with the cavity 130 of the mold 100, and can be directly expanded into an elbow product of the required size in the later stage. On the basis of the ordinary push-bending process, an elastic medium is added inside, and the internal molding pressure is controlled by a pressure sensor to ensure that the internal pressure meets the requirements of the pipe without deformation and the product is not dented during the molding process. The forming of small R elbows with a diameter of more than 60 mm can be achieved, which is simpler, faster and saves processes than traditional processes such as press bending and steel ball bending.

[0024] Preferably, the head of the auxiliary core head 300 is spherical, and the cross-section of the product after molding is circular. The auxiliary core head 300 cooperates with the elastic block inside the blank 500 to make the product molding effect full.

[0025] refer to Figure 4 , one end of the formed product 600 is a slope 610. The auxiliary core head 300 retreats after the pressure sensor reaches the set value and does not always contact the blank 500. Therefore, the end face of the auxiliary core head 300 of the product cannot be guaranteed to be a straight face all the time, and is generally a slope 610.

[0026] refer to Figure 2 , the first opening 110 is oriented perpendicular to the second opening 120. The blank 500 is formed into an elbow-shaped blank 500 in the cavity 130 of the mold 100, and the blank 500 and the cavity 130 of the mold 100 have the same size.

[0027] refer to Figure 2The cavity 130 includes a first cavity 131, a second cavity 132, and a third cavity 133 disposed between the first cavity 131 and the second cavity 132. The first opening 110 is disposed at one end of the first cavity 131, and the second opening 120 is disposed at one end of the second cavity 132. The length of the first cavity 131 is greater than the length of the second cavity 132. The blank 500 enters the first cavity 131 of the mold 100 from the first opening 110, enters the second cavity 132 through the third cavity 133, and leaves the mold 100 from the second opening 120 of the second cavity 132. The long length of the first cavity 131 facilitates the molding of the blank 500.

[0028] refer to Figure 1 The push-bending core head 200 is connected to a controller. The controller can control not only the advance and retreat of the auxiliary core head 300, but also the advance and retreat of the push-bending core head 200.

[0029] refer to Figure 1 The mold 100 is fixed relative to the ground. During the movement of the push-bending core head 200, the auxiliary core head 300 and the blank 500, the mold 100 will not move therewith.

[0030] The head size of the push-bending core head 200 is smaller than the size of the first opening 110 , so that the push-bending core head 200 can be easily inserted into the mold 100 through the first opening 110 , so that the push-bending core head 200 can contact and squeeze the blank 500 .

[0031] The head size of the auxiliary core head 300 is smaller than the size of the second opening 120 , so that the auxiliary core head 300 can be easily inserted into the mold 100 through the second opening 120 , so that the auxiliary core head 300 can freely move forward or backward in the mold cavity 130 .

[0032] refer to Figure 3 The two ends of the blank 500 are beveled 510, one side of the blank 500 is a long section 520, and the other side of the blank 500 is a short section 530. The two ends of the pipe blank 500 are beveled 510, and the length of the long section 520 of the blank 500 is the outer arc length of the finished elbow pipe fitting to be produced, and the length of the short section 530 of the elbow pipe fitting blank 500 is the inner arc length of the finished elbow pipe fitting to be produced.

[0033] Forming principle: The double-beveled blank 500 is put into the mold together with an elastic block of suitable size. After the mold is closed, the controller controls the auxiliary core head 300 to advance to the specified position, and the controller controls the push-bend core head 200 to advance to extrude the blank 500. When the pressure sensor on the auxiliary core head 300 reaches the set pressure value, it gives an electrical signal to the controller, and the controller controls the auxiliary core head 300 to retreat. At this time, the push-bend core head 200 continues to advance to extrude the blank 500. The blank 500 is in the cavity 130 of the mold 100. Under the joint action of the two core heads and the elastic block, an elbow-shaped blank 500 is formed. The blank 500 is consistent in size with the cavity 130 of the mold 100, and can be directly expanded and processed into an elbow product of the required size in the later stage.

[0034] The specific description of the present invention in the above embodiments is only used to further illustrate the present invention and cannot be understood as limiting the scope of protection of the present invention. Technical engineers in this field may make some non-essential improvements and adjustments to the present invention based on the contents of the above-mentioned utility model, which fall within the scope of protection of the present invention.

Claims

1. An elbow forming device, comprising an auxiliary core head, a push-bending core head and a mold with a cavity, wherein the mold is provided with a first opening and a second opening, characterized in that: The push-bending core head is arranged at the first opening and can enter the mold cavity from the first opening. The auxiliary core head is arranged at the second opening and can enter the mold cavity from the second opening. It also includes an elastomer arranged inside the blank. The auxiliary core head is provided with a pressure sensor, and the pressure sensor is connected to a controller that can control the auxiliary core head to move forward or backward.

2. The elbow forming device according to claim 1, characterized in that: The orientation of the first opening is perpendicular to the orientation of the second opening.

3. The elbow forming device according to claim 1, characterized in that: The mold cavity includes a first mold cavity, a second mold cavity and a third mold cavity arranged between the first mold cavity and the second mold cavity, the first opening is arranged at one end of the first mold cavity, the second opening is arranged at one end of the second mold cavity, and the length of the first mold cavity is greater than the length of the second mold cavity.

4. An elbow forming device according to claim 1, 2 or 3, characterized in that: The push-bending core head is connected with a controller.

5. The elbow forming device according to claim 1, characterized in that: The mold is fixedly arranged relative to the ground.

6. An elbow forming device according to claim 1, 2 or 3, characterized in that: The head size of the push-bending core head is smaller than the size of the first opening.

7. An elbow forming device according to claim 1, 2 or 3, characterized in that: The head size of the auxiliary core head is smaller than the size of the second opening.

8. The elbow forming device according to claim 1, characterized in that: Both ends of the blank are beveled, one side of the blank is a long section, and the other side of the blank is a short section.

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