Floating die for press riveting operations

Abstract

The utility model discloses a floating die head for pressure riveting operation, which is characterized by the following: a gas channel is arranged in the seat body, and a pneumatic mechanism is used to suck the rivet and firmly adsorb it on the bottom end of the inserting column. When there is no external force intervention, the elastic force of the top spring makes the sleeve ring and the seat body in a separated state, so that the local part of the rivet can enter the hollow area of the sleeve ring, realizing the automatic grabbing and positioning of the rivet. The sleeve ring is movably sleeved on the inserting column and is provided with a continuous elastic force by the top spring. When the floating die head with the rivet is lowered and contacts the lower die or the product to be processed, the sleeve ring can move upward relative to the seat body against the force of the top spring, the bottom wall of the inserting column is flush with the bottom wall of the sleeve ring, the contact area of the upper die and the product to be processed is increased, and the violent mechanical impact is converted into soft elastic buffering. Finally, the automatic material taking, buffering protection and precise positioning are integrated, the efficiency, quality and automation level of the pressure riveting operation are greatly improved.

Description

Technical Field

[0001] This utility model relates to the technical field of riveting equipment, and in particular to a floating die head for riveting operations. Background Technology

[0002] In the press-fit connection process, a press-fit machine typically drives an upper die to impact rivets, nuts, and other connecting parts, causing them to undergo plastic deformation and firmly bond with the substrate. Traditional press-fit upper dies are mostly rigid structures, directly mounted on the actuator of a pneumatic or hydraulic mechanism, lacking cushioning capabilities. During operation, especially on automated production lines, an additional material handling mechanism (such as a robotic arm) is required to first move the workpiece and precisely position it on the lower die, after which the upper die descends to complete the press-fit. This process not only increases the complexity and cost of the equipment, but also, during the high-speed downward press of the upper die, the rigid contact can easily lead to workpiece displacement or surface damage, affecting product quality.

[0003] Furthermore, this impact problem is particularly prominent for thin or high-surface-finish workpieces. Although some upper mold structures with simple spring buffers exist, their functions are limited and cannot simultaneously address the multiple needs of automatic workpiece gripping, precise positioning, and riveting buffer protection.

[0004] Therefore, the existing riveting upper die has obvious shortcomings in terms of automation, efficiency and high-quality riveting operation. Summary of the Invention

[0005] The main purpose of this invention is to propose a floating die head for riveting operations, which aims to solve the problem that existing riveting dies cannot simultaneously solve the problems of automatic workpiece gripping, precise positioning, and riveting buffer protection.

[0006] To achieve the above objectives, this utility model proposes a floating die head for riveting operations, comprising: Ring; The base has a vertically extending insert at its bottom and an air passage inside the base that penetrates its top wall and the bottom wall of the insert. The collar is movably sleeved on the insert post and can move axially relative to the seat body; A limiting structure is provided to prevent the collar from disengaging from the insert post; A top spring is provided between the collar and the seat body, and the top spring is used to apply a spring force to the collar in the direction of separation from the bottom of the seat body; When the collar abuts against the bottom of the seat, the bottom wall of the insert does not protrude from the plane where the bottom wall of the collar is located.

[0007] Preferably, the insert and the base are integrally formed or are detachably connected. When the connection structure is detachable, the insertion post is locked to the bottom of the base by threaded engagement, screw locking, or snap-fit ​​structure, and the insertion post and the base are sealed together.

[0008] Preferably, the limiting structure is a locking member screwed onto the collar; When the locking member is screwed into place and locked, the rod of the locking member extends inward into the hollow area of ​​the collar and is inserted into the slot of the insert post.

[0009] Preferably, the side wall of the collar is provided with a countersunk hole, the head of the locking member is accommodated in the countersunk hole, and the outer surface of the head of the locking member does not protrude from the curved surface of the outer peripheral wall of the collar.

[0010] Preferably, the top spring is connected in any of the following ways: (a) The upper end of the top spring is directly fixedly connected to the bottom wall of the seat, and the lower end of the top spring is directly fixedly connected to the top wall of the collar; (b) The top wall of the collar is provided with a first receiving groove, the bottom wall of the seat is provided with a second receiving groove aligned with the first receiving groove, the lower end of the top spring partially extends into the first receiving groove, and the upper end of the top spring partially extends into the second receiving groove.

[0011] Preferably, the number of top springs is three, and they are evenly spaced along the circumference of the collar, with the central axis of each top spring parallel to the direction of movement of the insert.

[0012] Preferably, the top of the seat is provided with a boss, and the air passage extends to penetrate the top wall of the boss.

[0013] Preferably, the limiting structure includes a strip groove and a limiting member; The insert post has a vertically extending groove on its side wall, and the collar is fixed with the limiting member. One end of the limiting member extends into the groove to restrict the insertion post from separating from the collar in the vertical direction.

[0014] In operation, this utility model connects a floating die head to a pneumatic mechanism. Through an air passage within the base, the pneumatic mechanism draws air to firmly attach the workpiece to the bottom of the insert post before operation. Without external interference, the elastic force applied by the top spring keeps the collar and base separated, allowing a portion of the workpiece to enter the hollow area of ​​the collar, achieving automatic workpiece gripping and positioning. The floating design, with the collar movably fitted onto the insert post and continuously elasticated by the top spring, allows the collar to overcome the top spring force and move upwards relative to the base when the floating die head with the workpiece adsorbed descends and contacts the lower die or base plate. This transforms severe mechanical impact into gentle elastic cushioning, effectively preventing displacement, deformation, or surface damage to the workpiece caused by rigid collisions, significantly improving the quality consistency and yield of the riveting products. Furthermore, the design where the bottom wall of the insert post does not protrude beyond the base surface ensures a flat and reliable workpiece adsorption surface and provides space for pre-positioning the workpiece. Compared with the traditional method, this utility model ultimately achieves a comprehensive and beneficial effect by integrating automatic material handling, buffer protection, and precise positioning, which greatly improves the efficiency, quality, and automation level of riveting operations. Attached Figure Description

[0015] Figure 1 This is a perspective view of the present utility model; Figure 2 A three-dimensional diagram of the base; Figure 3 This is a cross-sectional view of the present invention. Detailed Implementation

[0016] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0017] It should be noted that if any directional indication (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial, etc.) is involved in the embodiments of this utility model, the directional indication is only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0018] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0019] This utility model proposes a floating die head for riveting operations.

[0020] In this embodiment of the utility model, such as Figures 1 to 3 As shown, the floating die head collar 1 used for riveting operations has a ring-shaped structure and is used to be fixedly installed at a predetermined position on the worktable of the riveting equipment. Ring 1; The base 2 has a vertically extending insert 3 at its bottom and an air passage 21 inside the base that penetrates its top wall and the bottom wall of the insert 3. The collar 1 is movably sleeved on the insert post 3 and can move axially relative to the seat 2; A limiting structure is provided to prevent the collar from disengaging from the insert post; A top spring 5 is provided between the collar 1 and the seat 2. The top spring 5 is used to apply a spring force to the collar 1 in the direction of separation from the bottom of the seat. When the collar 1 abuts against the bottom of the seat 2, the bottom wall of the insert 3 does not protrude from the plane where the bottom wall of the collar 1 is located.

[0021] Specifically, the insert 3 and the base 2 are integrally formed or are detachable. When they are detachable, the insert 3 is locked to the bottom of the base 2 by threaded engagement, screw locking, or snap-fit ​​structure, and the insert and the base are sealed together.

[0022] Specifically, the limiting structure is a locking component screwed onto the collar 1; When the locking member is screwed into place and locked, the rod of the locking member extends inward into the hollow area of ​​the collar 1 and is inserted into the strip groove 31 of the insert post 3.

[0023] Specifically, the side wall of the collar 1 is provided with a countersunk hole 11, the head of the locking member is accommodated in the countersunk hole 11, and the outer surface of the head of the locking member does not protrude from the curved surface of the outer peripheral wall of the collar 1.

[0024] Specifically, the connection method of the top spring 5 is any of the following: (a) The upper end of the top spring 5 is directly fixedly connected to the bottom wall of the seat 2, and the lower end of the top spring 5 is directly fixedly connected to the top wall of the collar 1. (b) The top wall of the collar 1 is provided with a first receiving groove 12, and the bottom wall of the seat 2 is provided with a second receiving groove 22 aligned with the first receiving groove 12. The lower end of the top spring 5 extends into the first receiving groove 12, and the upper end of the top spring 5 extends into the second receiving groove 22.

[0025] Specifically, there are three top springs 5, which are evenly spaced along the circumference of the collar 1, and the central axis of each top spring 5 is parallel to the moving direction of the insert 3.

[0026] Specifically, the top of the base 2 is provided with a boss 23 for supporting the workpiece.

[0027] Specifically, the limiting structure includes a strip groove 31 and a limiting member 4; The insert 3 has a vertically extending groove 31 on its side wall, and the collar 1 is fixed with the limiting member 4. One end of the limiting member 4 extends into the groove 31 to restrict the insertion 3 from separating from the collar 1 in the vertical direction.

[0028] In operation, this utility model connects a floating die head to a pneumatic mechanism. Through an air passage within the base, the pneumatic mechanism draws air to firmly attach the workpiece to the bottom of the insert post before operation. Without external interference, the elastic force applied by the top spring keeps the collar and base separated, allowing a portion of the workpiece to enter the hollow area of ​​the collar, achieving automatic workpiece gripping and positioning. The floating design, with the collar movably fitted onto the insert post and continuously elasticated by the top spring, allows the collar to overcome the top spring force and move upwards relative to the base when the floating die head with the workpiece adsorbed descends and contacts the lower die or base plate. This transforms severe mechanical impact into gentle elastic cushioning, effectively preventing displacement, deformation, or surface damage to the workpiece caused by rigid collisions, significantly improving the quality consistency and yield of the riveting products. Furthermore, the design where the bottom wall of the insert post does not protrude beyond the base surface ensures a flat and reliable workpiece adsorption surface and provides space for pre-positioning the workpiece. Compared with the traditional method, this utility model ultimately achieves a comprehensive and beneficial effect by integrating automatic material handling, buffer protection, and precise positioning, which greatly improves the efficiency, quality, and automation level of riveting operations.

[0029] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A floating die head for riveting operations, characterized in that, include: Ring (1); The base (2) has a vertically extending insert (3) at the bottom and an air passage (21) that runs through its top wall and the bottom wall of the insert. The collar (1) is movably sleeved on the insert (3) and can move axially relative to the seat (2); A limiting structure is provided to prevent the collar from disengaging from the insert post; A top spring (5) is provided between the collar (1) and the seat (2), and the top spring (5) is used to apply an elastic force to the collar (1) in the direction of separation from the bottom of the seat; When the collar (1) abuts against the bottom of the seat (2), the bottom wall of the insert (3) does not protrude from the plane where the bottom wall of the collar (1) is located.

2. The floating die head for riveting operations as described in claim 1, characterized in that: The insert (3) and the base (2) are either integrally formed or detachably connected. When the connection structure is detachable, the insert (3) is locked to the bottom of the base (2) by threaded engagement, screw locking or by snap-fit ​​structure, and the insert and the base are sealed together.

3. The floating die head for riveting operations as described in claim 1, characterized in that: The limiting structure is a locking component screwed onto the collar (1); When the locking member is screwed into place and locked, the rod of the locking member extends inward into the hollow area of ​​the collar (1) and is inserted into the slot (31) of the insert (3).

4. The floating die head for riveting operations as described in claim 3, characterized in that: The side wall of the collar (1) is provided with a countersunk hole (11), the head of the locking member is accommodated in the countersunk hole (11), and the outer surface of the head of the locking member does not protrude from the curved surface of the outer peripheral wall of the collar (1).

5. The floating die head for riveting operations as described in claim 1, characterized in that: The top spring (5) can be connected in any of the following ways: (a) The upper end of the top spring (5) is directly fixedly connected to the bottom wall of the seat (2), and the lower end of the top spring (5) is directly fixedly connected to the top wall of the collar (1); (b) The top wall of the collar (1) is provided with a first receiving groove (12), and the bottom wall of the seat (2) is provided with a second receiving groove (22) aligned with the first receiving groove (12). The lower end of the top spring (5) extends into the first receiving groove (12), and the upper end of the top spring (5) extends into the second receiving groove (22).

6. The floating die head for riveting operations as described in claim 1, characterized in that: The number of top springs (5) is three, and they are evenly spaced along the circumference of the collar (1). The central axis of each top spring (5) is parallel to the moving direction of the insert (3).

7. The floating die head for riveting operations as described in claim 1, characterized in that: The top of the seat (2) is provided with a boss (23), and the air passage extends to penetrate the top wall of the boss.

8. The floating die head for riveting operations as described in claim 1, characterized in that: The limiting structure includes a strip groove (31) and a limiting member (4); The insert (3) has a vertically extending groove (31) on its side wall. The collar (1) is fixed with a limiting member (4). One end of the limiting member (4) extends into the groove (31) to restrict the insertion (3) from separating from the collar (1) in the vertical direction.

Images