A processing device for hardware furniture

Abstract

The present invention relates to the technical field of hardware processing, and specifically to a processing device for hardware furniture, comprising a mold frame, and also comprising: a lower workpiece and a second groove thereon, the lower workpiece being located on the mold frame; an upper workpiece and a first groove thereon, the upper workpiece and the lower workpiece are both provided with positioning holes, the first groove and the second groove can form a countersunk hole structure with the positioning holes; a rivet body is arranged between the first groove and the second groove, the blind end of the rivet body passes through the positioning hole through the first groove and penetrates into the second groove, the front end brim of the rivet body abuts against the inner wall of the first groove, the first groove, the second groove and the rivet body are coaxially designed; an upper die controlled by the output end of a press, the upper die is crimped to the front end brim of the rivet body and applies pressure to deform the front end brim and embed it into the inner wall of the first groove; the present invention can perform riveting inside the upper workpiece and the lower workpiece to avoid the rivet head being exposed to the outside.

Description

Technical Field

[0001] The invention relates to the technical field of hardware processing, in particular to a processing device for hardware furniture. Background Art

[0002] Various hardware accessories are needed during the assembly process of furniture, generally including basic hardware, functional hardware or decorative hardware, and have good strength and durability.

[0003] In the prior art, for the hardware accessories used in furniture, the strength of the riveted hardware is sufficient to meet the use requirements of the furniture. Riveting is suitable for connecting various parts of the cabinet, including drawers, hinges, handles, screws and other common hardware. However, during the riveting process, the protrusions or rivet heads are easily exposed, affecting the size and use of the hardware. Summary of the invention

[0004] The present invention provides a processing device for hardware furniture, which can perform riveting inside an upper workpiece and a lower workpiece to avoid the rivet head being exposed to the outside, and at the same time enables the front end brim and the blind end part of the rivet body to form an embedded fit between the upper workpiece and the lower workpiece, thereby improving stability and interlocking capability.

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

[0006] A processing device for hardware furniture, comprising a mold frame and:

[0007] A lower workpiece and a second groove thereon, the lower workpiece is located on the mold frame; an upper workpiece and a first groove thereon, the upper workpiece and the lower workpiece are both provided with positioning holes, the first groove and the second groove can form a countersunk hole structure with the positioning holes; a rivet body is assembled between the first groove and the second groove, the blind end of the rivet body passes through the positioning hole from the first groove and penetrates into the second groove, the front end brim of the rivet body abuts against the inner wall of the first groove, the first groove, the second groove and the rivet body are coaxially designed; an upper die controlled by the output end of the press, the upper die is crimped on the front end brim of the rivet body and applies pressure to deform the front end brim and embed it into the inner wall of the first groove; a nail core assembled with the rivet body, the blind end of the rivet body can be fixedly connected to the inner wall of the second groove after the nail core is pulled out.

[0008] Optionally, the top of the upper workpiece is pressed with a pressure ring, and a matching die is filled and assembled between the pressure ring and the die wall of the upper die, the upper die is slidably arranged in the inner wall of the matching die, the bottom plane of the matching die and the crimping end plane of the upper die are coplanar, the front end brim of the rivet body is designed to be a disc-shaped structure, and the annular outer wall of the front end brim fits tightly with the inner wall of the first groove, the annular outer wall of the front end brim can be deformed and embedded in the inner wall of the first groove to form a first embedded part, and the inner wall of the first groove is recessed and self-lockingly embedded with the first embedded part.

[0009] Optionally, a functional groove is provided in the upper die along its axis, a reinforcing core is controllably slidably installed in the functional groove, and the inner diameter of the functional groove is equal to the hole diameter of the rivet body.

[0010] Optionally, the nail core has a breaking point. When the nail core is pulled out, the nail head part of the nail core will be pressed into the blind end of the rivet body, and the blind end will be deformed and abut against the inner wall of the second groove, and the blind end will form a first deformation part, and the annular outer wall of the first deformation part will be in interference fit with the inner wall of the second groove, and the first deformation part will limit the movement of the nail head.

[0011] Optionally, the depth of the second groove is greater than the height of the first deformation portion, and an overload space is left between the deformation portion of the first deformation portion and the inner wall of the second groove.

[0012] Optionally, the outer diameter of the blind end of the rivet body is equal to the inner diameter of the second groove. When the nail head portion of the nail core is pressed into the blind end of the rivet body, the blind end is deformed into a second deformation portion, and the inner wall of the second groove is sunken with a recessed portion, and the second deformation portion is embedded in the recessed portion.

[0013] Optionally, the inner recess is an arc-shaped depression, and the first embedded portion fits the inner recessed portion of the first groove in an arc curve, and the arc curve gradually approaches the axis of the upper mold in the direction from the inside to the outside.

[0014] Optionally, the top of the brim at the front end of the rivet body is pressed by the upper die and evenly sunken downward to form a depression groove, and the edge of the crimping end of the upper die is smoothly configured.

[0015] Optionally, the diameter of the rivet body is equal to the inner diameter of the positioning hole.

[0016] Optionally, a buffer fillet is designed at the inner wall opening of the blind end of the rivet body, and a slide-in fillet is designed at the connection between the nail head and the nail rod of the nail core, and there is a matching relationship between the buffer fillet and the slide-in fillet.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] First, when the upper die moves downward and applies pressure to the front end brim of the rivet body, the countersunk hole structure will block the rivet body, allowing the front end brim part to deform, and at the same time, the inner wall of the first groove will be recessed synchronously, so that the front end brim can be embedded in the recessed part of the first groove, so that the front end brim of the rivet body and the recessed part of the first groove are interlocked. Secondly, through the cooperation of the nail core and the core pulling of the rivet body, the rivet head part after the core pulling will abut against the inner wall of the second groove, and the rivet body uses its two ends to complete the locking riveting of the upper workpiece and the lower workpiece, thereby improving the quality of the fixed connection between the two hardware plates, and at the same time, it can also prevent the rivet head or protrusion from being exposed to the outside of the plate.

[0019] 2. When the nail core is pulled by the riveting machine, the nail head part of the nail core will be pressed into the blind end, and the outer wall of the blind end will conflict with the inner wall of the second groove, so that the inner wall of the second groove will be sunken to form an inner concave portion, and at the same time, the blind end will be deformed into the second deformation portion, and the fixing will be completed by embedding between the inner concave portion and the second deformation portion. At this time, the front end brim and the blind end part of the rivet body are respectively embedded in the inner walls of the first groove and the second groove, completing the internal riveting of the upper workpiece and the lower workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the assembly of the rivet body in the present invention;

[0021] Figure 2 It is a schematic diagram of the assembly between the rivet body and the upper die in the present invention;

[0022] Figure 3 It is a schematic diagram of the state of the processing device after the front end brim of the rivet body is deformed in the present invention;

[0023] Figure 4 It is a cross-sectional view of the front end brim of the rivet body after deformation in the present invention;

[0024] Figure 5 It is an assembly schematic diagram of the first embodiment of the blind end deformation of the rivet body in the present invention;

[0025] Figure 6 It is a schematic diagram of the state of the blind end deformation of the rivet body in the first embodiment of the present invention;

[0026] Figure 7 It is a cross-sectional view of the blind end of the rivet body after deformation in the present invention;

[0027] Figure 8 It is an assembly schematic diagram of the second embodiment of the blind end deformation of the rivet body in the present invention;

[0028] Fig. 9 It is a schematic diagram of the state of the second embodiment of the blind end deformation of the rivet body in the present invention;

[0029] Fig.10The figure is a disassembled view of the riveting between the upper workpiece, the lower workpiece and the rivet body according to the present invention.

[0030] In the figure: 1, upper workpiece; 2, lower workpiece; 3, rivet body; 4, nail core; 5, upper die; 6, pressure ring; 7, matching die; 8, reinforcing core; 9, first embedded part; 11, first groove; 12, second groove; 14, first deformation part; 15, second deformation part; 16, depression groove; 17, positioning hole; 18, inner concave part; 19, mold frame. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] See also Figures 1 to 10 The present invention provides a technical solution: a processing device for hardware furniture, including a mold frame 19, and also including:

[0033] The lower workpiece 2 and the second groove 12 thereon, the lower workpiece 2 is located on the mold frame 19; the upper workpiece 1 and the first groove 11 thereon, the upper workpiece 1 and the lower workpiece 2 are both provided with a positioning hole 17, and the first groove 11 and the second groove 12 can form a countersunk hole structure with the positioning hole 17; a rivet body 3 is assembled between the first groove 11 and the second groove 12, the blind end of the rivet body 3 passes through the positioning hole 17 through the first groove 11 and penetrates into the second groove 12, the front end brim of the rivet body 3 abuts against the inner wall of the first groove 11, and the first groove 11, the second groove 12 and the rivet body 3 are coaxially designed; the upper die 5 controlled by the output end of the press, the upper die 5 is crimped on the front end brim of the rivet body 3 and pressurized, so that the front end brim is deformed and embedded into the inner wall of the first groove 11; the nail core 4 assembled with the rivet body 3, after the nail core 4 is pulled out, the blind end of the rivet body 3 can be fixedly connected to the inner wall of the second groove 12.

[0034] In the prior art, the exposed protrusions or rivet heads will interfere with the size of the hardware, affecting its installation space and accuracy. For external hardware, the exposed rivet heads will be impacted, resulting in a reduction in riveting strength and affecting its appearance. In the present invention, by designing the countersunk hole structure of the upper workpiece 1, the rivet body 3 can be assembled between the upper workpiece 1 and the lower workpiece 2, and the rivet body 3 is used as an intermediate bridge to bridge the upper workpiece 1 and the lower workpiece 2. At the same time, the downward displacement of the upper mold 5 will exert a force on the front end brim of the rivet body 3, so that the front end brim of the rivet body 3 conflicts with the inner wall of the first groove 11, and the upper mold 5 Continue to apply pressure and use the countersunk hole structure to block the rivet body 3 so that the front end brim part can be deformed, and at the same time, the inner wall of the first groove 11 is simultaneously recessed, so that the front end brim can be embedded in the recessed part of the first groove 11, so that the front end brim of the rivet body 3 and the recessed part of the first groove 11 are interlocked. Secondly, through the core pulling cooperation between the nail core 4 and the rivet body 3, the rivet head part after core pulling will abut against the inner wall of the second groove 12, and the rivet body 3 uses its two ends to complete the locking riveting of the upper workpiece 1 and the lower workpiece 2, thereby improving the quality of the fixed connection between the two hardware plates, and at the same time, it can also prevent the rivet head or protrusion from being exposed to the outside of the plate.

[0035] Among them, it is more special that in this embodiment, the first groove 11 is used as a stamping or cold pressing fit between the lower mold and the upper mold 5. The difference between the present invention and the existing mold fit is that the workpiece is used as the lower mold and the other workpiece is used as a pad, which greatly reduces the mold structure, and each time the processing is completed, the lower mold is replaced accordingly when the workpiece is replaced, and the wear between the lower mold and the upper mold is avoided.

[0036] Among them, a more preferred embodiment is that the top of the upper workpiece 1 is pressed with a pressure ring 6, and a matching mold 7 is filled and assembled between the pressure ring 6 and the mold wall of the upper mold 5. The upper mold 5 is slidably arranged in the inner wall of the matching mold 7, and the bottom plane of the matching mold 7 and the crimping end plane of the upper mold 5 are in a coplanar relationship. The front end brim of the rivet body 3 is designed to be a disc-shaped structure, and the annular outer wall of the front end brim is tightly fitted with the inner wall of the first groove 11. The annular outer wall of the front end brim can be deformed and embedded in the inner wall of the first groove 11 to form a first embedded portion 9, and the inner wall of the first groove 11 is recessed and embedded with the first embedded portion 9 for self-locking.

[0037] See also Figures 2 to 4In this embodiment, the upper workpiece 1 and the lower workpiece 2 are positioned and restricted by the pressure ring 6, and the upper die 5 can be guided by the cooperation between the matching die 7 and the pressure ring 6. Secondly, since the crimping end planes of the matching die 7 and the upper die 5 are coplanar, when the matching die 7 and the upper die 5 are both in contact with the front end brim of the rivet body 3, the upper die 5 is continued to be driven downward by the press. At this time, the matching die 7 is restricted by the pressure ring 6, and the upper die 5 squeezes the front end brim of the rivet body 3 downward, causing it to undergo plastic deformation and form a first embedded portion 9. At the same time, the inner wall of the first groove 11 will be sunken inward to form an embedded interlocking with the first embedded portion 9, thereby completing the locking of one end of the rivet body 3. At this time, the upper workpiece 1 and the rivet body 3 are fixedly connected.

[0038] Among them, due to the obstruction of the matching mold 7, when the upper mold 5 applies downward pressure, the front end brim part of the rivet body 3 will extend and deform outward along its axial direction, thereby forming an inlay connection with the first groove 11 in an all-round manner, thereby improving the stability and quality of the fixed connection.

[0039] Furthermore, a functional groove is provided in the upper die 5 along its axis, and a reinforcing core 8 is controllably slidably installed in the functional groove. The inner diameter of the functional groove is equal to the hole diameter of the rivet body 3. Please refer to Figure 2 and Figure 3 In order to improve the embedding quality, the present embodiment designs the cooperation between the functional groove and the reinforcing core 8, so that the aperture of the rivet body 3 can be filled and supported by the reinforcing core 8, thereby preventing the aperture of the rivet body 3 from shrinking when the upper mold 5 applies pressure to the front brim of the rivet body 3. Secondly, the functional groove can also serve as a receiving groove to provide space for the movement of the nail core 4, provided that the reinforcing core 8 is removed before inserting the nail core 4, wherein the inner diameter of the functional groove is equal to the aperture of the rivet body 3, so that the functional groove and the aperture of the rivet body 3 can be seamlessly connected during the downward movement of the upper mold 5, thereby facilitating the upward and downward displacement of the reinforcing core 8.

[0040] On the basis that the front end brim is embedded and locked, two implementation schemes for blind-end locking of the rivet body 3 are provided.

[0041] Embodiment 1:

[0042] The nail core 4 has a breaking point. When the nail core 4 is pulled out, the nail head part of the nail core 4 will be pressed into the blind end of the rivet body 3, and the blind end will be deformed and abut against the inner wall of the second groove 12, and the blind end will form a first deformation part 14, and the annular outer wall of the first deformation part 14 will be in interference fit with the inner wall of the second groove 12, and the first deformation part 14 will limit the movement of the nail head. Furthermore, the depth of the second groove 12 is greater than the height of the first deformation part 14, and an overload space is left between the deformation part of the first deformation part 14 and the inner wall of the second groove 12.

[0043] See also Figures 5 to 7In this embodiment, an external rivet machine is used to engage and fix the nail rod of the nail core 4, and the nail core 4 is pulled, so that the nail head part of the nail core 4 will contact with the blind end, and then the nail head part enters the inner wall of the blind end, and the blind end is deformed according to the shape of the nail head, and the outer wall of the deformed first deformation part 14 will contact with the inner wall of the second groove 12. At this time, due to the mutual force between the two ends of the rivet body 3, the upper workpiece 1 and the lower workpiece 2 are locked by the rivet body 3, and the upper and lower ends of the rivet body 3 are respectively located in the first groove 11 and the second groove 12, thereby avoiding the rivet head and the front end brim from being exposed to the outside of the workpiece, and the part sunk in the first groove 11 or the second groove 12 is not easily damaged by external interference.

[0044] The overload space can provide space for the subsequent deformation and rebound of the first deformation part 14. When subjected to strong external force, the first deformation part 14 can consume energy by its own deformation after being subjected to the force. Secondly, the workpiece will be accompanied by rebound deformation while being shaped, so that the workpiece will rebound.

[0045] Embodiment 2:

[0046] The outer diameter of the blind end of the rivet body 3 is equal to the inner diameter of the second groove 12. When the nail head portion of the nail core 4 is pressed into the blind end of the rivet body 3, the blind end is deformed into a second deformation portion 15, and the inner wall of the second groove 12 is sunken with an inner recess 18. The second deformation portion 15 is embedded in the inner recess 18, and the inner recess 18 is an arc-shaped recess. The first embedded portion 9 and the sunken portion of the first groove 11 are fitted into an arc curve, and the arc curve gradually approaches the axis of the upper mold 5 in the direction from the inside to the outside.

[0047] See also Figures 8 to 10 In this embodiment, since the inner diameter of the second groove 12 is reduced, the inner wall of the second groove 12 contacts the outer wall of the blind end of the rivet body 3. When the nail core 4 is pulled by the riveting machine, since the front brim of the rivet body 3 has been locked, the upper die 5, the pressure ring 6 and the matching die 7 can ensure that the rivet body 3 can remain stable during the core pulling process. Except for the blind end, other parts will not be deformed. The nail head part of the nail core 4 will be pressed into the blind end, and the outer wall of the blind end will conflict with the inner wall of the second groove 12, so that the second The inner wall of the groove 12 will be sunken to form an inner recess 18, and the blind end will be deformed into a second deformation portion 15. The fixing is completed by embedding the inner recess 18 and the second deformation portion 15. At this time, the front end brim and the blind end of the rivet body 3 are respectively embedded in the inner walls of the first groove 11 and the second groove 12, completing the internal riveting of the upper workpiece 1 and the lower workpiece 2. Compared with the prior art, the number of fixedly connected parts is reduced, and the plastic deformation of the upper workpiece 1 and the lower workpiece 2 is directly used to complete the interlocking with the two ends of the rivet body 3.

[0048] Secondly, the bow-shaped design of the inner concave portion 18 and the arc-shaped curve design of the first embedded portion 9 can effectively improve the interlocking ability and prevent the rivet body 3 from being separated from the upper workpiece 1 or the lower workpiece 2.

[0049] Based on the implementation example of the function slot, see Figure 4 and Figure 3 In the enlarged detail view, the top of the brim of the front end of the rivet body 3 is pressed by the upper die 5 and evenly sunken downward to form a depression groove 16. The edge of the crimping end of the upper die 5 is smoothly configured, which improves the smoothness of the entire riveting process and avoids jamming or jamming, which causes cold drawing damage to the parts.

[0050] In summary, further, the diameter of the rivet body 3 is equal to the inner diameter of the positioning hole 17 , so that the rivet body 3 and the positioning hole 17 can be better matched and connected.

[0051] Furthermore, a buffer fillet is designed at the inner wall opening of the blind end of the rivet body 3, and a slide-in fillet is designed at the connection between the nail head and the nail rod of the nail core 4, and there is a matching relationship between the buffer fillet and the slide-in fillet.

[0052] By utilizing the above-mentioned structures, riveting can be performed inside the upper workpiece 1 and the lower workpiece 2 to avoid the rivet head being exposed to the outside. At the same time, the front end brim and the blind end of the rivet body 3 can form an embedded fit with the upper workpiece 1 and the lower workpiece 2 to improve stability and interlocking capability.

[0053] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A processing device for hardware furniture, comprising a mold frame (19), characterized in that: Also includes: A lower workpiece (2) and a second groove (12) thereon, wherein the lower workpiece (2) is located on a mold frame (19); An upper workpiece (1) and a first groove (11) thereon, wherein both the upper workpiece (1) and the lower workpiece (2) are provided with a positioning hole (17), and the first groove (11) and the second groove (12) can form a countersunk hole structure with the positioning hole (17); A rivet body (3) is mounted between the first groove (11) and the second groove (12); a blind end of the rivet body (3) passes through the positioning hole (17) from the first groove (11) and into the second groove (12); a front end brim of the rivet body (3) abuts against an inner wall of the first groove (11); and the first groove (11), the second groove (12) and the rivet body (3) are coaxially designed; An upper die (5) controlled by an output end of a press machine, the upper die (5) being crimped onto a front brim of the rivet body (3) and applying pressure, so that the front brim is deformed and embedded into an inner wall of the first groove (11); A nail core (4) assembled with the rivet body (3), wherein after the nail core (4) is pulled out, the blind end of the rivet body (3) can be fixedly connected to the inner wall of the second groove (12); The top of the upper workpiece (1) is pressed tightly with a pressure ring (6), and a matching mold (7) is filled and assembled between the pressure ring (6) and the mold wall of the upper mold (5). The upper mold (5) is slidably arranged in the inner wall of the matching mold (7), and the bottom plane of the matching mold (7) and the crimping end plane of the upper mold (5) are in a coplanar relationship. The front end brim of the rivet body (3) is designed as a disc-shaped structure, and the annular outer wall of the front end brim is tightly fitted with the inner wall of the first groove (11). The annular outer wall of the front end brim can be deformed and embedded in the inner wall of the first groove (11) to form a first embedded part (9), and the inner wall of the first groove (11) is sunken and embedded with the first embedded part (9) for self-locking; A functional groove is provided in the upper die (5) along its axis, a reinforcing core (8) is controllably slidably mounted in the functional groove, and the inner diameter of the functional groove is equal to the hole diameter of the rivet body (3); The top of the brim at the front end of the rivet body (3) is pressed by the upper die (5) and evenly recessed downward to form a depression groove (16), and the edge of the crimping end of the upper die (5) is smoothly configured.

2. The processing device for hardware furniture according to claim 1, characterized in that: The nail core (4) has a breaking point. When the nail core (4) is pulled out, the nail head portion of the nail core (4) will be pressed into the blind end of the rivet body (3), and the blind end will be deformed and abut against the inner wall of the second groove (12). The blind end will form a first deformation portion (14), and the annular outer wall of the first deformation portion (14) will be in interference abutment with the inner wall of the second groove (12). The first deformation portion (14) will limit the movement of the nail head.

3. The processing device for hardware furniture according to claim 2, characterized in that: The depth of the second groove (12) is greater than the height of the first deformation portion (14), and an overload space is left between the deformation portion of the first deformation portion (14) and the inner wall of the second groove (12).

4. The processing device for hardware furniture according to claim 1, characterized in that: The outer diameter of the blind end of the rivet body (3) is equal to the inner diameter of the second groove (12); when the nail head portion of the nail core (4) is pressed into the blind end of the rivet body (3), the blind end is deformed into a second deformation portion (15), and an inner concave portion (18) is formed in the inner wall of the second groove (12), and the second deformation portion (15) is embedded in the inner concave portion (18).

5. The processing device for hardware furniture according to claim 4 is characterized in that: The inner recess (18) is in the shape of an arc, and the first embedded portion (9) and the indented portion of the first groove (11) are fitted into an arc curve, and the arc curve gradually approaches the axis of the upper mold (5) in the direction from the inside to the outside.

6. The processing device for hardware furniture according to any one of claims 1 to 5, characterized in that: The diameter of the rivet body (3) is equal to the inner diameter of the positioning hole (17).

7. The processing device for hardware furniture according to claim 6, characterized in that: A buffer fillet is designed at the inner wall opening of the blind end of the rivet body (3), and a slide-in fillet is designed at the connection between the nail head and the nail rod of the nail core (4), and there is a matching relationship between the buffer fillet and the slide-in fillet.

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