Floating type adjustable positioning tool for thermal forming die

Abstract

The utility model discloses a buoyancy lift type adjustable positioning tool for a thermal forming die. The buoyancy lift type adjustable positioning tool comprises a positioning tool body, an upper nitrogen spring and a lower nitrogen spring. The upper nitrogen spring is arranged in the upper die, the lower nitrogen spring is arranged in the lower die, the upper nitrogen spring and the lower nitrogen spring are oppositely arranged, and the positioning tool body is fixedly connected to the end of the lower nitrogen spring. During mold closing, the upper nitrogen spring and the lower nitrogen spring abut against each other to drive the material sheet to descend to a forming working face along with the positioning tool body. And during mold opening, the upper and lower nitrogen springs are reset, and the positioning tool body returns to the initial position. The positioning tool adapts to thermal forming parts with different heights through adjustment of the upper nitrogen spring and the lower nitrogen spring, the strength of the positioning tool is enhanced, the risks of positioning tool breakage and die damage are reduced, and the positioning precision and the thermal forming quality are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile production molds and relates to a floating type adjustable positioning tool for a hot forming mold. Background Art

[0002] With the trend of automobile lightweighting, automobile energy conservation and emission reduction, the proportion of thermoforming parts used in body parts is gradually increasing. The diversity of parts is increasing, such as the increase in forming height and the complexity of part modeling. The frequency of development and use of thermoforming molds is increasing. The existing thermoforming molds are positioned in the form of holes + support locators to ensure the stability of thermoforming sheet feeding.

[0003] Conventional hot-formed parts (such as anti-collision beams / AB columns, etc.) have low forming heights and simple structures. Fixed-height support fixtures are often used to roughly position and guide the blanks to ensure accurate feeding positions. Existing support fixtures are suitable for positioning heights below 200mm. For parts with large strokes, the mold support positioning height needs to be increased. The fixtures are weak and are prone to bending or even breaking after being stressed during the production process, resulting in deviation of blanks and reduced feeding accuracy. At the same time, broken fixtures are prone to falling into the mold, causing mold damage. Utility Model Content

[0004] In view of this, the purpose of the present invention is to solve the above-mentioned problem and provide a floating adjustable positioning device for a thermoforming mold.

[0005] In order to achieve the above object, the utility model provides the following technical solutions:

[0006] A floating adjustable positioning device for a hot forming mold comprises a positioning device body, an upper nitrogen spring and a lower nitrogen spring;

[0007] The upper nitrogen spring is arranged in the upper mold of the hot forming mold, and the lower nitrogen spring is arranged in the lower mold of the hot forming mold; the upper nitrogen spring and the lower nitrogen spring are arranged opposite to each other, and the positioning tool body is arranged between the upper nitrogen spring and the lower nitrogen spring, and the positioning tool body is fixedly connected to the end of the lower nitrogen spring; when the mold is closed, the sheet is placed on the positioning tool body, and the upper nitrogen spring and the lower nitrogen spring are pressed against each other, driving the sheet to descend to the forming working surface with the positioning tool body, and when the mold is opened, the upper nitrogen spring and the lower nitrogen spring are reset, and the positioning tool body returns to the initial position.

[0008] Furthermore, a positioning tool mounting seat is provided at one end of the lower nitrogen spring, a mounting groove is provided on the positioning tool mounting seat, and the positioning tool body is fixedly arranged in the mounting groove.

[0009] Furthermore, the positioning tool body is L-shaped.

[0010] Furthermore, a top block is provided on the positioning tool mounting seat, one end of the top block passes through the positioning tool mounting seat and is connected to the end of the lower nitrogen spring, and the other end passes through the positioning tool body and is opposite to the upper nitrogen spring. The upper nitrogen spring is opposed to the lower nitrogen spring through the top block.

[0011] Furthermore, a fixing seat is provided at the bottom of the lower nitrogen spring, and the lower nitrogen spring is fixed on the fixing seat; a sealing cover is provided at one end of the lower nitrogen spring close to the positioning tool body, and the sealing cover is sleeved on the lower nitrogen spring and connected to the lower mold of the thermoforming mold for sealing between the lower nitrogen spring and the lower mold.

[0012] Furthermore, an anti-rotation stopper is provided on one side of the sealing cover for circumferential limiting.

[0013] Furthermore, the lower nitrogen spring is sequentially provided with guide pillars and guide sleeves from the inside to the outside, and the lower nitrogen spring is supported by the guide pillars and the guide sleeves in the lower mold of the hot forming mold.

[0014] Working principle:

[0015] 1) When the mold is closed, the blank is placed on the positioning tool body, the upper nitrogen spring presses against the lower nitrogen spring, and the lower nitrogen spring yields and shrinks first. The lower nitrogen spring is finally compressed to the bottom. The blank moves down to the working plane position with the positioning tool body to complete the molding.

[0016] 2) When the mold is opened, the upper nitrogen spring is reset first, and the lower nitrogen spring is reset later. The positioning tool body rises with the lower nitrogen spring and returns to the initial position.

[0017] The beneficial effects of the utility model are:

[0018] The utility model uses the top-to-bottom effect of the upper and lower nitrogen springs, so that the positioning tool body can float up or down with the opening and closing of the mold, ensuring the positioning accuracy of the sheet during the mold closing process, thereby improving the molding quality of the hot-formed parts. The height of the positioning tool body can be adjusted by the upper and lower nitrogen springs to adapt to hot-formed parts of different heights, especially suitable for parts with larger molding heights, solving the problem that traditional fixed-height support positioning tools cannot adapt.

[0019] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and research, or can be taught from the practice of the present invention to some extent. The objectives and other advantages of the present invention can be achieved and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be described in detail below in conjunction with the accompanying drawings, in which:

[0021] Figure 1 , 2 It is a three-dimensional diagram of a floating adjustable positioning device used for a thermoforming mold in the utility model.

[0022] Figure 3 It is a schematic diagram of the use status of the floating adjustable positioning device used for the thermoforming mold in the utility model.

[0023] Figure markings: 1-upper nitrogen spring; 2-positioning tool body; 3-positioning tool mounting seat; 4-sealing cover; 5-guide sleeve; 6-guide column; 7-fixing seat; 8-anti-rotation block; 9-top block; 10-lower nitrogen spring; 11-upper mold; 12-lower mold. DETAILED DESCRIPTION

[0024] The following describes the implementation of the present invention through specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. The following embodiments and the features in the embodiments can be combined with each other without conflict.

[0025] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present utility model. In order to better illustrate the embodiments of the present utility model, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0026] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "back" and the like indicate directions or positional relationships, they are based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0027] See also Figures 1 to 3 , which is a floating adjustable positioning device for a thermoforming mold, comprising a positioning device body 2, an upper nitrogen spring 1, and a lower nitrogen spring 10;

[0028] The upper nitrogen spring 1 is arranged in the upper mold 11 of the thermoforming mold, and the lower nitrogen spring 10 is arranged in the lower mold 12 of the thermoforming mold; the upper nitrogen spring 1 and the lower nitrogen spring 10 are arranged opposite to each other, the positioning tool body 2 is arranged between the upper nitrogen spring 1 and the lower nitrogen spring 10, and the positioning tool body 2 is fixedly connected to the end of the lower nitrogen spring 10; when the mold is closed, the sheet is placed on the positioning tool body 2, and the upper nitrogen spring 1 and the lower nitrogen spring 10 are pressed against each other, driving the sheet to descend to the forming working surface with the positioning tool body 2, and when the mold is opened, the upper nitrogen spring 1 and the lower nitrogen spring 10 are reset, and the positioning tool body 2 returns to the initial position.

[0029] A positioning tool mounting seat 3 is provided at one end of the lower nitrogen spring 10 , and a mounting groove is provided on the positioning tool mounting seat 3 . The positioning tool body 2 is L-shaped, and the bottom is fixed in the mounting groove by bolts.

[0030] A top block 9 is provided on the positioning tool mounting seat 3. One end of the top block 9 passes through the positioning tool mounting seat 3 and is connected to the end of the lower nitrogen spring 10, and the other end passes through the positioning tool body 2 and is opposite to the upper nitrogen spring 1. The upper nitrogen spring 1 is opposed to the lower nitrogen spring 10 through the top block 9.

[0031] A fixing seat 7 is provided at the bottom of the lower nitrogen spring 10, and the lower nitrogen spring 10 is fixedly arranged on the fixing seat 7; a sealing cover 4 is provided at one end of the lower nitrogen spring 10 close to the positioning tool body 2, and the sealing cover 4 is sleeved on the lower nitrogen spring 10 and connected to the lower mold 12 of the thermoforming mold, and a sealing ring is installed on the sealing cover 4 for sealing between the lower nitrogen spring 10 and the lower mold 12.

[0032] An anti-rotation stopper 8 is provided on one side of the sealing cover 4 for circumferential limiting, installation and positioning of the sealing cover 4, and preventing rotation.

[0033] The lower nitrogen spring 10 is sequentially mounted with guide posts 6 and guide sleeves 5 from the inside to the outside. The lower nitrogen spring 10 is supported by the guide posts 6 and the guide sleeves 5 and arranged in the lower die 12 of the hot forming die. The guide posts 6 support the lower nitrogen spring 10, and the guide sleeves 5 and the lower die 12 fit closely to ensure installation accuracy.

[0034] The working process includes two processes: mold closing and mold opening:

[0035] 1) When the mold is closed, the blank is placed on the positioning tool body 2, the upper nitrogen spring 1 presses against the lower nitrogen spring 10, and the lower nitrogen spring 10 yields and contracts first. The lower nitrogen spring 10 is finally compressed to the bottom. The blank moves down to the working plane position with the positioning tool body 2 to complete the molding.

[0036] 2) When the mold is opened, the upper nitrogen spring 1 is reset first, and the lower nitrogen spring 10 is reset later, and the positioning tool body 2 rises with the lower nitrogen spring 10 and returns to the initial position.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the utility model.

Claims

1. A floating adjustable positioning device for a thermoforming mold, characterized in that: It includes a positioning device body, an upper nitrogen spring and a lower nitrogen spring; The upper nitrogen spring is arranged in the upper mold of the hot forming mold, and the lower nitrogen spring is arranged in the lower mold of the hot forming mold; the upper nitrogen spring and the lower nitrogen spring are arranged opposite to each other, and the positioning tool body is arranged between the upper nitrogen spring and the lower nitrogen spring, and the positioning tool body is fixedly connected to the end of the lower nitrogen spring; when the mold is closed, the sheet is placed on the positioning tool body, and the upper nitrogen spring and the lower nitrogen spring are pressed against each other, driving the sheet to descend to the forming working surface with the positioning tool body, and when the mold is opened, the upper nitrogen spring and the lower nitrogen spring are reset, and the positioning tool body returns to the initial position.

2. The floating adjustable positioning device for a thermoforming mold according to claim 1, characterized in that: A positioning tool mounting seat is provided at one end of the lower nitrogen spring, a mounting groove is provided on the positioning tool mounting seat, and the positioning tool body is fixedly arranged in the mounting groove.

3. The floating adjustable positioning device for a thermoforming mold according to claim 2, characterized in that: The positioning tool body is L-shaped.

4. The floating adjustable positioning device for a thermoforming mold according to claim 2, characterized in that: The positioning tool mounting seat is provided with a top block, one end of the top block passes through the positioning tool mounting seat and is connected to the end of the lower nitrogen spring, and the other end passes through the positioning tool body and is opposite to the upper nitrogen spring. The upper nitrogen spring is opposed to the lower nitrogen spring through the top block.

5. The floating adjustable positioning device for a thermoforming mold according to claim 2, characterized in that: A fixing seat is provided at the bottom of the lower nitrogen spring, and the lower nitrogen spring is fixed on the fixing seat; a sealing cover is provided at one end of the lower nitrogen spring close to the positioning tool body, and the sealing cover is sleeved on the lower nitrogen spring and connected to the lower mold of the thermoforming mold for sealing between the lower nitrogen spring and the lower mold.

6. The floating adjustable positioning device for a thermoforming mold according to claim 5, characterized in that: An anti-rotation stopper is provided on one side of the sealing cover for circumferential limiting.

7. The floating adjustable positioning device for a thermoforming mold according to claim 2, characterized in that: The lower nitrogen spring is sequentially covered with guide posts and guide sleeves from the inside to the outside, and the lower nitrogen spring is supported by the guide posts and the guide sleeves and arranged in the lower mold of the hot forming mold.

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