Self-positioning primer press-fitting device

Abstract

The utility model relates to the field of primer press fitting, and discloses a self-positioning primer press fitting device which comprises a base, a guide sleeve, a punch rod, a positioning core and an elastic ring, the guide sleeve is composed of a positioning seat and a guide sleeve, a guide hole penetrating through the guide sleeve and the positioning seat is formed in the guide sleeve, and the inner diameter of the guide hole is matched with the outer diameter of the large end of a primer; an accommodating cavity and a positioning hole which are coaxial with the guide hole are respectively formed in the upper surface and the lower surface of the positioning seat; the inner diameter of the positioning hole is matched with the outer diameter of a press fitting piece; the guide sleeve is fixedly connected with the positioning seat through a bolt, and a limiting column coaxial with the guide hole is arranged on the lower surface of the guide sleeve; the positioning core is in a circular ring shape formed by splicing a plurality of arc-shaped blocks, the diameter of an inner hole of the positioning core is matched with the outer diameter of the small end of the primer, a limiting hole matched with the outer diameter of the limiting column is formed in the upper surface of the positioning core, and a chamfer is arranged between the limiting hole and the inner hole; the elastic ring is arranged on the outer side of the positioning core and used for hooping the positioning core. According to the utility model, the self-positioning of the primer in the press-fitting process is realized, and the press-fitting quality is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of primer pressing, and in particular to a self-positioning primer pressing device for pressing primers into cartridge cases, primer seats and other pressing components, and is suitable for primer assembly of small and medium caliber shells. Background Technology

[0002] A primer is a pyrotechnic device installed at the bottom of a cartridge case or primer holder, ignited by mechanical or electrical energy input. It is used to output a flame to ignite the propellant charge or ignition source. Existing primer press-fit devices are shown in the attached instruction manual. Figure 1 As shown, the device includes a base 1 for positioning the press-fit component 6, a guide sleeve 2 for pressing the press-fit component 6 and guiding the primer 7, and a punch 3 for pressing the primer 7 into the press-fit component 6. During press-fitting, the primer is placed in the guide sleeve, and pressure is applied to the primer by the upward punch, forcing the primer into the press-fit component. Existing low-pressure press-fitting devices have the following drawbacks:

[0003] 1. When pressing a “T” type (large at the top and small at the bottom) primer, because the primer guide part is located at the thinner upper end, the lower end of the primer is suspended in the air. During the pressing process, it is difficult to ensure that the primer and the primer hole of the pressing part are concentric, which may lead to the primer being crushed or even exploded.

[0004] 2. By controlling the dimensions of the punch and guide sleeve to ensure the primer is pressed into place (limited type), due to the manufacturing tolerances of the primer and the pressing parts themselves, this type of rigid pressing is prone to problems such as the primer not being pressed into place or the primer being damaged, resulting in poor primer pressing quality.

[0005] Based on this, this application provides a self-positioning primer pressing device to solve the above problems. Utility Model Content

[0006] The present invention aims to solve the technical problems existing in the prior art. To this end, the present invention provides a self-positioning primer pressing device that can meet the requirements of "T" type primer pressing and has high pressing quality.

[0007] The technical solution adopted by this utility model to solve its technical problem is:

[0008] A self-positioning primer pressing device is provided, comprising a base for positioning the pressing component, a guide sleeve for pressing the pressing component and guiding the primer, and a punch for pressing the primer into the pressing component; it also includes a positioning core and an elastic ring; the guide sleeve is composed of a positioning seat and a guide sleeve, and has a guide hole penetrating the guide sleeve and the positioning seat, the inner diameter of the guide hole matching the outer diameter of the large end of the primer; the upper and lower surfaces of the positioning seat are respectively provided with a cavity and a positioning hole coaxial with the guide hole, the inner diameter of the positioning hole matching the outer diameter of the pressing component; the guide sleeve is fixedly connected to the positioning seat by bolts, and its lower surface is provided with a limiting post coaxial with the guide hole; the positioning core is a ring composed of multiple arc-shaped blocks, the diameter of its inner hole matching the outer diameter of the small end of the primer, and the upper surface of the positioning core is provided with a limiting hole matching the outer diameter of the limiting post, and a chamfer is provided between the limiting hole and the inner hole; the elastic ring is located on the outside of the positioning core and is used to tighten the positioning core.

[0009] In some alternative embodiments, the outer wall of the positioning core is provided with a U-shaped groove, and the elastic ring is disposed in the U-shaped groove.

[0010] In some alternative implementations, the positioning core is composed of two arc-shaped blocks, which are held together by elastic rings on the limiting post.

[0011] In some alternative implementations, there is a gap between the two ends of the two arc-shaped blocks.

[0012] In some alternative implementations, the chamfer is a rounded corner or a right angle, and the maximum diameter of the chamfer is greater than the inner diameter of the guide hole.

[0013] In some optional embodiments, the upper surface of the positioning seat is further provided with a positioning groove, and the lower surface of the guide sleeve is further provided with a positioning flange that is inserted and engaged with the positioning groove.

[0014] In some alternative embodiments, an elastic pad is also included, which is fixed to the upper surface of the guide sleeve and is coaxially arranged with the guide hole.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. This utility model sets a positioning core and an elastic ring composed of multi-lobed arc-shaped blocks inside the guide sleeve. The positioning core guides the small end of the primer. As the primer is pressed down, the positioning core can gradually open without affecting the large end of the primer entering the positioning core. This solves the problem of misalignment between the primer and the primer hole of the press-fitting part, realizes the self-positioning of the primer during the press-fitting process, and greatly improves the press-fitting quality.

[0017] 2. Under the elastic force of the positioning core, the impact during the bottom fire pressing process is small, which improves the safety of pressing.

[0018] 3. The design of the elastic pad provides elasticity for the downward pressure of the punch, realizing the transformation from rigid downward pressure to elastic downward pressure, which can greatly reduce the waste rate of the primer;

[0019] 4. The device has a simple structure and high pressing reliability, and has promotional value in the automated pressing of "T" type primers. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0021] Figure 1 This is a structural schematic diagram of an existing pre-fired press-fit device;

[0022] Figure 2 This is a structural schematic diagram of the self-positioning primer pressing device provided by this utility model;

[0023] Figure 3 yes Figure 2 A schematic diagram of the positioning core is provided.

[0024] Figure 4 yes Figure 3 A top view of the provided positioning core.

[0025] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0026] 1—Base, 2—Guide sleeve, 2.0—Guide hole, 2.1—Positioning seat, 2.1.1—Cavity, 2.1.2—Positioning hole, 2.1.3—Positioning groove, 2.2—Guide sleeve, 2.2.1—Limiting post, 2.2.2—Positioning flange, 3—Punch, 4—Positioning core, 4.1—Arc block, 4.2—Inner hole, C—Chamfer, 4.3—Limiting hole, 4.4—U-groove, 5—Elastic ring, 6—Pressure fitting, 7—Bottom, 8—Bolt, 9—Elastic pad. Detailed Implementation

[0027] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0029] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. The terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0030] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0031] Example 1

[0032] This embodiment provides a self-positioning primer pressing device, suitable for pressing a "T"-shaped primer into a pressing component. (See attached...) Figure 2 As shown, the bottom-fired pressing device includes a base 1, a guide sleeve 2, a punch 3, a positioning core 4, and an elastic ring 5, wherein:

[0033] The base 1 is used to position the press-fit component 6;

[0034] The guide sleeve 2 consists of a positioning seat 2.1 and a guide sleeve 2.2. It has a guide hole 2.0 that penetrates both the guide sleeve 2.2 and the positioning seat 2.1. The inner diameter of the guide hole 2.0 matches the outer diameter of the large end of the primer 7, providing guidance for the large end of the primer. The upper and lower surfaces of the positioning seat 2.1 are respectively provided with a cavity 2.1.1 and a positioning hole 2.1.2, coaxial with the guide hole 2.0. The cavity 2.1.1 is used to place the positioning core 4, and the inner diameter of the positioning hole 2.1.2 matches the outer diameter of the press-fit component 6, serving to position the guide sleeve and also pressing the press-fit component onto the base. The guide sleeve 2.2 is fixedly connected to the positioning seat 2.1 by bolts 8, and its lower surface has a limiting post 2.2.1 coaxial with the guide hole 2.0. To ensure the concentricity of the positioning seat and the guide sleeve, this embodiment provides a positioning groove 2.1.3 on the outer edge of the upper surface of the positioning seat 2.1, and a positioning flange 2.2.2 that is inserted and matched with the positioning groove 2.1.3 on the lower surface of the guide sleeve 2.2. The positioning seat and the guide sleeve are positioned by the positioning groove and the positioning flange, and the cavity and the limiting post are coaxial.

[0035] The positioning core 4 is an annular ring composed of multiple arc-shaped blocks 4.1. The diameter of its inner hole 4.2 matches the outer diameter of the small end of the primer 7, and the inner hole guides the small end of the primer. The upper surface of the positioning core 4 is provided with a limiting hole 4.3 that matches the outer diameter of the limiting post 2.2.1. After the positioning core is placed in the cavity, the limiting post of the guide sleeve is located in the limiting hole, at which time the multiple arc-shaped blocks of the limiting hole hold the limiting post. A chamfer C is provided between the limiting hole 4.3 and the inner hole 4.2. The chamfer C can be a rounded corner or a right angle, and the maximum diameter of the chamfer C is greater than the inner diameter of the guide hole 2.0 to ensure that the large end of the primer can smoothly enter the positioning core under the action of the punch. In a preferred embodiment of this embodiment, the positioning core 4 is composed of two arc-shaped blocks 4.1, and the two arc-shaped blocks 4.1 are clamped to the limiting post 4.3 by an elastic ring 5. Optionally, there is a gap between the two ends of the two arc-shaped blocks.

[0036] The elastic ring 5 is located on the outside of the positioning core 4 and is used to tighten the positioning core. Specifically, the outer wall of the positioning core 4 is provided with a U-shaped groove 4.4, and the elastic ring 5 is located in the U-shaped groove 4.4.

[0037] The punch 3 is used to press the primer 7 into the press fitting 6.

[0038] During the press-fit process, the primer is placed in the guide sleeve, and the primer slides down along the guide hole of the guide sleeve to the positioning core. The lower end of the primer is positioned by the positioning core. The punch pushes the primer down, and the two arc-shaped blocks of the positioning core gradually open. The primer is aligned with the primer hole of the press-fit part, and the punch continues to press down until the primer is pressed into place.

[0039] Example 2

[0040] Based on Example 1, as shown in the appendix Figure 2 As shown, this embodiment also includes an elastic pad 9, which is fixed to the upper surface of the guide sleeve 2.2 and is coaxially arranged with the guide hole 2.0. The elastic pad designed in this embodiment, during the continuous downward pressing of the punch, changes from rigid pressing to elastic pressing under the action of the elastic pad, which can greatly reduce the primer damage rate.

[0041] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A self-positioning primer pressing device, comprising a base for positioning the pressing component, a guide sleeve for pressing the pressing component and providing guidance for the primer, and a punch for pressing the primer into the pressing component; characterized in that: It also includes a positioning core and an elastic ring; The guide sleeve consists of a positioning seat and a guide sleeve, and has a guide hole that passes through the guide sleeve and the positioning seat. The inner diameter of the guide hole matches the outer diameter of the large end of the primer. The upper and lower surfaces of the positioning seat are respectively provided with a cavity and a positioning hole coaxial with the guide hole. The inner diameter of the positioning hole matches the outer diameter of the press-fit part. The guide sleeve is fixedly connected to the positioning seat by bolts, and its lower surface is provided with a limiting post coaxial with the guide hole. The positioning core is a ring made up of multiple arc-shaped blocks. The diameter of its inner hole matches the outer diameter of the small end of the primer. The upper surface of the positioning core is provided with a limiting hole that matches the outer diameter of the limiting post. A chamfer is provided between the limiting hole and the inner hole. The elastic ring is located on the outside of the positioning core and is used to tighten the positioning core.

2. The self-positioning underfire pressing device according to claim 1, characterized in that: The outer wall of the positioning core is provided with a U-shaped groove, and the elastic ring is disposed in the U-shaped groove.

3. The self-positioning underfire pressing device according to claim 1, characterized in that: The positioning core is composed of two arc-shaped blocks, which are held together by elastic rings on the limiting post.

4. The self-positioning underfire pressing device according to claim 3, characterized in that: There is a gap between the two ends of the two arc-shaped blocks.

5. The self-positioning primer pressing device according to claim 1, characterized in that: The chamfer is either a rounded corner or a right angle, and the maximum diameter of the chamfer is greater than the inner diameter of the guide hole.

6. The self-positioning primer pressing device according to claim 1, characterized in that: The upper surface of the positioning seat is provided with a positioning groove, and the lower surface of the guide sleeve is provided with a positioning flange that is inserted and engaged with the positioning groove.

7. The self-positioning underfire pressing device according to any one of claims 1 to 6, characterized in that: It also includes an elastic pad, which is fixed to the upper surface of the guide sleeve and is coaxially arranged with the guide hole.

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