Structure for realizing accurate positioning of positioning pin in mold assembly

Abstract

The utility model discloses a structure for realizing accurate positioning of a positioning pin in die assembly, which comprises an expansion sleeve, the positioning pin and an expansion locking cap, the upper end of the expansion sleeve is provided with a first through groove extending to the lower end of the expansion sleeve, and the bottom of the expansion sleeve is provided with a second through groove extending to the upper end of the expansion sleeve. The positioning pin is inserted into the expansion sleeve, a screw rod is arranged at the front end of the positioning pin, the expansion locking cap is installed on the screw rod in a threaded mode, an expansion cap is arranged at the outer end of the positioning pin, and expansion cavities corresponding to the outer contours of the expansion locking cap and the expansion cap are formed in the two ends of the expansion sleeve. The expansion locking cap and the expansion cover cap enter the expansion cavity to expand the two ends of the expansion sleeve, so that the accurate positioning effect of interference fit is achieved; in addition, by adjusting the distance between the expansion locking cap and the expansion cover cap, the expansion sleeve is adjusted to contract, and the effects that the workpiece is convenient to disassemble and high in efficiency are achieved.

Description

Technical Field

[0001] This utility model relates to the technical field of mold assembly, specifically a structure for a positioning pin to achieve precise positioning during mold assembly. Background Technology

[0002] For precise positioning during mold assembly, and considering the ease and efficiency of workpiece disassembly, the original positioning pin structure is generally composed of a round body made of stainless steel. It is machined and quenched to a Rockwell hardness of about 56 HRC, and then processed by external cylindrical grinding, which can effectively ensure the accuracy and service life of the positioning pin. In practice, in order to achieve precise positioning, the existing positioning pin and the workpiece are fitted with a clearance fit. If the clearance is too small, it will damage the workpiece, jam the workpiece, and make it difficult to disassemble later. If the clearance is too large, the workpiece positioning will be deviated, and it will not achieve the positioning effect. Utility Model Content

[0003] To address the shortcomings of existing technologies where the locating pin and workpiece are only in a clearance fit (too small a clearance can damage the workpiece, jam it, and make subsequent disassembly difficult, while too large a clearance can lead to workpiece positioning deviations and fail to achieve the desired positioning effect), this utility model provides a structure for achieving precise positioning of the locating pin during mold assembly.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0005] This utility model discloses a structure for precise positioning of a positioning pin in mold assembly, comprising an expansion sleeve, a positioning pin, and an expansion locking cap. The upper end of the expansion sleeve is provided with a first through groove extending to the lower end of the expansion sleeve, and the bottom of the expansion sleeve is provided with a second through groove extending to the upper end of the expansion sleeve. The positioning pin is inserted into the expansion sleeve, and the front end of the positioning pin is provided with a screw. The expansion locking cap is threaded onto the screw. The outer end of the positioning pin is provided with an expansion cap. Both ends of the expansion sleeve are provided with expansion cavities corresponding to the outer contours of the expansion locking cap and the expansion cap.

[0006] As a preferred technical solution of this utility model, the side wall of the expansion sleeve is provided with a sliding groove that is colinear with the first through groove, and the positioning pin is equipped with a sliding rod that slides along the sliding groove.

[0007] As a preferred technical solution of this utility model, the outer end of the expansion locking cap is provided with a hexagonal hole.

[0008] As a preferred embodiment of this utility model, the expansion sleeve, expansion locking cap, and expansion cap are all made of stainless steel.

[0009] As a preferred embodiment of this utility model, the expansion locking cap is a frustum-shaped structure that is wider on the outside and narrower on the inside.

[0010] As a preferred technical solution of this utility model, the expansion cap is also a frustum-shaped structure that is wider on the outside and narrower on the inside.

[0011] The beneficial effects of this utility model are:

[0012] This type of positioning pin features an expansion sleeve in its structure for precise positioning during mold assembly. The expansion sleeve has a first through groove extending from its upper end to its lower end, and a second through groove extending from its bottom to its upper end. When the positioning pin is inserted into the expansion sleeve and the expansion locking cap is tightened, the expansion locking cap and expansion cap enter the expansion cavity, expanding both ends of the expansion sleeve to achieve a precise positioning effect with an interference fit. Furthermore, by adjusting the distance between the expansion locking cap and the expansion cap, the expansion sleeve can be adjusted to contract, resulting in convenient and efficient disassembly of the workpiece. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0014] Figure 1 This is a schematic diagram of a positioning pin structure for achieving precise positioning during mold assembly, according to this utility model.

[0015] Figure 2 This is a schematic diagram of the positioning pin structure of the present invention, which is a positioning pin for achieving precise positioning in mold assembly;

[0016] Figure 3 This is a schematic diagram of the expansion sleeve of the present invention, which is a structure for achieving precise positioning of a positioning pin in mold assembly;

[0017] Figure 4 This is an installation diagram of a positioning pin structure for achieving precise positioning during mold assembly, according to this utility model.

[0018] In the diagram: 1. Expansion sleeve; 2. Positioning pin; 3. Expansion locking cap; 4. First through groove; 5. Second through groove; 6. Screw; 7. Expansion cap; 8. Expansion cavity; 9. Slide groove; 10. Slide rod. Detailed Implementation

[0019] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0020] Example: Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, this utility model discloses a structure for precise positioning of a positioning pin in mold assembly, comprising an expansion sleeve 1, a positioning pin 2, and an expansion locking cap 3. The upper end of the expansion sleeve 1 is provided with a first through groove 4 extending to the lower end of the expansion sleeve 1, and the bottom of the expansion sleeve 1 is provided with a second through groove 5 extending to the upper end of the expansion sleeve 1. The positioning pin 2 is inserted into the expansion sleeve 1, and the front end of the positioning pin 2 is provided with a screw 6. The expansion locking cap 3 is threaded onto the screw 6. The outer end of the positioning pin 2 is provided with an expansion cap 7. Both ends of the expansion sleeve 1 are provided with expansion cavities 8 corresponding to the outer contours of the expansion locking cap 3 and the expansion cap 7. An expansion sleeve 1 is provided, with a first through groove 4 extending from the upper end of the expansion sleeve 1 to the lower end of the expansion sleeve 1, and a second through groove 5 extending from the bottom of the expansion sleeve 1 to the upper end of the expansion sleeve 1. When the positioning pin 2 is inserted into the expansion sleeve 1 and the expansion locking cap 3 is tightened, the expansion locking cap 3 and the expansion cap 7 enter the expansion cavity 8, expanding both ends of the expansion sleeve 1 to achieve a precise positioning effect of interference fit. In addition, by adjusting the distance between the expansion locking cap 3 and the expansion cap 7, the expansion sleeve 1 is adjusted to shrink, achieving the effect of convenient and efficient disassembly of the workpiece.

[0021] The expansion sleeve 1 has a sliding groove 9 on its side wall that is colinear with the first through groove 4, and the positioning pin 2 is equipped with a sliding rod 10 that slides along the sliding groove 9. This serves to limit the movement and prevent the positioning pin from rotating when the expansion locking cap is tightened, thus failing to achieve a good positioning and locking effect.

[0022] The expansion locking cap 3 has a hexagonal hole at its outer end, which facilitates operation with an external wrench.

[0023] The expansion sleeve 1, expansion locking cap 3, and expansion cap 7 are all made of stainless steel, processed and quenched to a Rockwell hardness of about 56HRC, and then processed by external cylindrical grinding, which can effectively ensure the accuracy and service life of the positioning pin.

[0024] The expansion locking cap 3 is a frustum-shaped structure that is wider on the outside and narrower on the inside.

[0025] During operation, this type of positioning pin achieves precise positioning in mold assembly. It is equipped with an expansion sleeve 1, and has a first through groove 4 extending from the upper end of the expansion sleeve 1 to the lower end of the expansion sleeve 1. The bottom of the expansion sleeve 1 has a second through groove 5 extending from the upper end of the expansion sleeve 1. When the positioning pin 2 is inserted into the expansion sleeve 1 and the expansion locking cap 3 is tightened, the expansion locking cap 3 and the expansion cap 7 enter the expansion cavity 8, expanding both ends of the expansion sleeve 1 to achieve a precise positioning effect with interference fit. In addition, by adjusting the distance between the expansion locking cap 3 and the expansion cap 7, the expansion sleeve 1 can be adjusted to shrink, achieving the effect of convenient and efficient disassembly of the workpiece.

[0026] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A structure for positioning a pin in a mold assembly to achieve accurate positioning, characterized by: The expansion sleeve (1), the positioning pin (2) and the expansion locking cap (3) are included, the upper end of the expansion sleeve (1) is provided with the first through slot (4) extending to the lower end of the expansion sleeve (1), the bottom of the expansion sleeve (1) is provided with the second through slot (5) extending to the upper end of the expansion sleeve (1), the positioning pin (2) is inserted into the expansion sleeve (1), the front end of the positioning pin (2) is provided with the screw rod (6), the expansion locking cap (3) is screwed on the screw rod (6), the outer end of the positioning pin (2) is provided with the expansion cap (7), the two ends of the expansion sleeve (1) are provided with the expansion cavity (8) corresponding to the outer contour of the expansion locking cap (3) and the expansion cap (7).

2. The positioning pin according to claim 1, wherein, The side wall of the expansion sleeve (1) is provided with the sliding groove (9) arranged in line with the first through slot (4), and the positioning pin (2) is provided with the sliding rod (10) sliding along the sliding groove (9).

3. The positioning pin of claim 1, wherein the positioning pin is configured to be assembled in a mold to achieve precise positioning. The outer end of the expansion locking cap (3) is provided with the hexagonal hole.

4. The positioning pin of claim 1, wherein the positioning pin is configured to achieve precise positioning in a mold assembly. The expansion sleeve (1), the expansion locking cap (3) and the expansion cap (7) are made of stainless steel.

5. The positioning pin according to claim 1, wherein, The expansion locking cap (3) is a circular truncated cone structure with wide outer and narrow inner.

6. The positioning pin of claim 1, wherein the positioning pin is configured to achieve precise positioning in a mold assembly. The expansion cap (7) is also a circular truncated cone structure with wide outer and narrow inner.

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