Riveting assembly for split type flange riveting machine

Abstract

The riveting assembly for the split type flange riveting machine comprises a riveting head, an inner inserting sleeve and a sealing ring, a center hole is formed in the riveting head, a step face protruding inwards in the radial direction is arranged at the lower end of the center hole, the inner inserting sleeve is inserted into the center hole from top to bottom, the lower end face of the inner inserting sleeve abuts against the step face, an inserting hole is formed in the center of the inner inserting sleeve, and the sealing ring is arranged in the inserting hole. An L-shaped groove is formed in the bottom face of the inner inserting sleeve, the L-shaped groove and the step face jointly define a sealing ring installation groove with an opening facing the axis, the sealing ring is arranged in the sealing ring installation groove, and a conical riveting face is arranged at the position of an opening in the lower end of the center hole and used for folding and pressing the step protrusion of the flange to the step chamfer of the mandrel. During riveting, the central spindle is inserted into the insertion hole of the inner insertion sleeve from bottom to top, and the central spindle is tightly sleeved through the sealing ring so that the central spindle can be fixed. The split type structure is adopted, the sealing ring cannot scratch a product, manual positioning adjustment is not needed, and the sealing ring is convenient to replace regularly. The structure is simplified, cost is reduced and efficiency is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of riveting equipment, in particular to a riveting assembly for a split flange riveting machine. Background Art

[0002] The utility model patent with authorization announcement number CN220575164U discloses a split flange riveting machine, which is mainly used to realize the riveting assembly of the split flange and the mandrel. In this structure, the upper riveting assembly is a key assembly for fixing the mandrel and realizing the riveting between the step chamfer of the mandrel and the raised step of the flange. The mandrel is inserted into the inner hole of the lower clamping block. After downward riveting, the mandrel and the inner hole are easily stuck due to the downward pressure of the lower clamping block, resulting in damage to the surface of the mandrel; in addition, due to the certain error in the size of the step chamfer of the mandrel and the raised step of the flange, in actual operation, the riveting assembly is pressed down each time by the same distance. At this time, due to the size error and assembly error, some products will be deformed due to the transition of compression, and some products will be loose due to poor riveting. Therefore, in view of the above problems, it is urgent to provide a new type of riveting assembly to cooperate with the above riveting machine. Utility Model Content

[0003] The technical problem to be solved by the utility model is: in order to overcome the shortcomings of the riveting assembly in the prior art, the utility model provides a riveting assembly for a split flange riveting machine.

[0004] The utility model solves the technical problem by adopting the following technical scheme: a riveting assembly for a split flange riveting machine, comprising a riveting head, an inner sleeve and a sealing ring, the riveting head being provided with a center hole, the lower end of the center hole being provided with a step surface protruding radially inward, the inner sleeve being inserted into the center hole from top to bottom, and the lower end surface of the inner sleeve being against the step surface, the center of the inner sleeve being provided with an insertion hole, and the bottom surface of the inner sleeve being provided with an L-shaped groove, the L-shaped groove and the step surface jointly forming a sealing ring mounting groove with an opening facing the axis, the sealing ring being arranged in the sealing ring mounting groove, and a conical riveting surface being provided at the opening at the lower end of the center hole, the riveting surface being used to gather and press the step protrusion of the flange onto the step chamfer of the core shaft; during riveting, the shaft core is inserted into the insertion hole of the inner sleeve from bottom to top, and the core shaft is fixed by the sealing ring by tightening the core shaft.

[0005] In order to avoid scratching the surface of the core shaft, a first arc-shaped transition surface is also provided between the connection between the riveting surface and the inner wall of the center hole.

[0006] Preferably, the central angle of the first arc-shaped transition surface is 45°.

[0007] In order to avoid scratching the surface of the core shaft, a second arc-shaped transition surface is also provided between the connection between the inner side of the step surface and the inner wall of the center hole.

[0008] Preferably, the central angle of the second arc-shaped transition surface is 90°.

[0009] Furthermore, the riveting head is provided with at least two countersunk through holes in the axial direction, and the countersunk through holes are used to achieve fixed connection with the upper connecting block. The number of countersunk through holes can be set according to actual needs, preferably two countersunk through holes are used, namely a first countersunk through hole and a second countersunk through hole, and the positions of the two countersunk through holes are symmetrical along the radial direction. If there are three or more countersunk through holes, they are evenly distributed along the circumferential direction.

[0010] The utility model has the following beneficial effects: the utility model provides a riveting assembly for a split flange riveting machine, which uses a conical riveting surface for overall riveting, ensuring uniform force at the riveting point, making the riveted product reliable in quality and beautiful in appearance; the elasticity of the sealing ring is used to fix the mandrel, avoiding damage to the product surface, and at the same time, buffering and absorbing the processing error, avoiding riveting transition deformation of the product and loose riveting; arc transition is used at the edges and corners on the side facing the mandrel, avoiding scratches on the product; the split structure is adopted, the sealing ring will not scratch the product, no manual positioning adjustment is required, and the sealing ring is convenient to replace regularly. The structure is simplified, the cost is reduced, and the efficiency is increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0012] Figure 1 It is a three-dimensional structural schematic diagram of the riveting assembly of the utility model.

[0013] Figure 2 It is a three-dimensional structural schematic diagram of the riveting assembly of the utility model.

[0014] Figure 3 It is a schematic diagram of the cross-sectional structure of the riveting assembly of the utility model.

[0015] Figure 4 yes Figure 3 Schematic diagram of the enlarged structure at point A in the middle.

[0016] Figure 5 It is a schematic diagram of the cross-sectional structure of the riveting head.

[0017] Figure 6 It is a schematic diagram of the cross-sectional structure of the inner sleeve.

[0018] Figure 7 This is a schematic diagram of the product structure after riveting is completed.

[0019] In the figure: 1. riveting head, 1.1. center hole, 1.2. first countersunk through hole, 1.3. second countersunk through hole, 1.4. riveting surface, 1.5. first arcuate transition surface, 1.6. step surface, 1.7. second arcuate transition surface, 2. inner sleeve, 2.1. L-shaped groove, 2.2. jack, 3. sealing ring, 4. mandrel, 4.1. step chamfer, 5. flange, 5.1. raised step. DETAILED DESCRIPTION

[0020] Now the utility model is described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, which only illustrates the basic structure of the utility model in a schematic manner, so it only shows the components related to the utility model.

[0021] like Figure 1-Figure 6 As shown, the utility model is a riveting assembly for a split flange 5 riveting machine, comprising a riveting head 1, an inner sleeve 2 and a sealing ring 3, wherein the riveting head 1 is provided with a center hole 1.1, and the lower end of the center hole 1.1 is provided with a step surface 1.6 protruding radially inward, the inner sleeve 2 is inserted into the center hole 1.1 from top to bottom, and the lower end surface of the inner sleeve 2 is against the step surface 1.6, the center of the inner sleeve 2 is provided with an insertion hole 2.2, and the bottom surface of the inner sleeve 2 is provided with an L-shaped groove 2.1, The L-shaped groove 2.1 and the step surface 1.6 together form a sealing ring 3 installation groove with an opening facing the axis. The sealing ring 3 is arranged in the sealing ring 3 installation groove. A conical riveting surface 1.4 is provided at the lower end opening of the center hole 1.1. The riveting surface 1.4 is used to gather the step protrusion of the flange 5 and press it onto the step chamfer 4.1 of the core shaft 4. During riveting, the shaft core is inserted into the insertion hole 2.2 of the inner sleeve 2 from bottom to top, and the core shaft 4 is fixed by tightening the core shaft 4 through the sealing ring 3.

[0022] As shown in the figure, in order to avoid scratching the surface of the mandrel 4, a first arc-shaped transition surface 1.5 is provided between the connection between the riveting surface 1.4 and the inner wall of the center hole 1.1; a second arc-shaped transition surface 1.7 is provided between the connection between the inner side of the step surface 1.6 and the inner wall of the center hole 1.1. Preferably, in this embodiment, the central angle of the first arc-shaped transition surface 1.5 is 45°; the central angle of the second arc-shaped transition surface 1.7 is 90°.

[0023] Furthermore, at least two countersunk through holes are provided in the axial direction on the riveting head 1, and the countersunk through holes are used to achieve fixed connection with the upper connecting block. The number of countersunk through holes can be set according to actual needs, preferably two countersunk through holes are used, namely the first countersunk through hole 1.2 and the second countersunk through hole 1.3, and the positions of the two countersunk through holes are symmetrical along the radial direction. If there are three or more countersunk through holes, they are evenly distributed along the circumference.

[0024] Working principle:

[0025] Put the inner sleeve 2 into the center hole 1.1 of the riveting block, and then connect the riveting block to the upper connecting block of the riveting press by screws; insert the mandrel 4 into the socket 2.2 from bottom to top. Since the sealing ring 3 has a certain elasticity, the mandrel 4 can be held tightly, thereby fixing the mandrel 4 without damaging the appearance of the mandrel 4; then the riveting press drives the riveting assembly to move downward as a whole, so that the mandrel 4 is inserted into the flange 5, and the raised step 5.1 is covered with the step chamfer 4.1, and the downward pressure is continued. The riveting surface 1.4 acts on the raised step 5.1 to push it inward to cover the step chamfer 4.1, and the riveting fixation is completed.

[0026] like Figure 7 The following is a schematic diagram of the product structure after riveting. The detailed description of the riveting machine, the split flange 5 and the mandrel 4 can be referred to the contents recorded in the utility model patent with the authorization announcement number CN220575164U, so it will not be described in detail here.

[0027] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without departing from the scope of the utility model through the above description. The technical scope of this utility model is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A riveting assembly for a split flange riveting machine, characterized in that: It comprises a riveting head, an inner sleeve and a sealing ring, wherein a center hole is arranged inside the riveting head, a step surface protruding radially inward is arranged at the lower end of the center hole, the inner sleeve is inserted into the center hole from top to bottom, and the lower end surface of the inner sleeve is against the step surface, a plug hole is arranged at the center of the inner sleeve, and an L-shaped groove is arranged on the bottom surface of the inner sleeve, the L-shaped groove and the step surface together form a sealing ring installation groove with an opening facing the axis, the sealing ring is arranged in the sealing ring installation groove, a conical riveting surface is arranged at the opening of the lower end of the center hole, and the riveting surface is used to gather and press the step protrusion of the flange onto the step chamfer of the core shaft; when riveting, the shaft core is inserted into the plug hole of the inner sleeve from bottom to top, and the core shaft is fixed by tightening the core shaft through the sealing ring.

2. The riveting assembly for a split flange riveting machine according to claim 1, characterized in that: A first arc-shaped transition surface is also provided between the connection between the riveting surface and the inner wall of the central hole.

3. The riveting assembly for a split flange riveting machine according to claim 2, characterized in that: The central angle of the first arc-shaped transition surface is 45°.

4. The riveting assembly for a split flange riveting machine according to claim 1, characterized in that: A second arc-shaped transition surface is also provided between the connection between the inner side of the step surface and the inner wall of the central hole.

5. The riveting assembly for a split flange riveting machine according to claim 4, characterized in that: The central angle of the second arc-shaped transition surface is 90°.

6. The riveting assembly for a split flange riveting machine according to claim 1, characterized in that: At least two countersunk through holes are axially arranged on the riveting head, and the countersunk through holes are used to achieve fixed connection with the upper connecting block.

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