Moulding tool applied to cold header

Abstract

The invention discloses a mould making tool applied to a cold header, which comprises a mould making base, an ejector rod is movably sleeved in the mould making base, the mould making base comprises a head end and a tail end, the head end and the tail end are respectively positioned on two opposite side parts of the mould making base, the ejector rod can move along the axial direction of the mould making base, and the extension section of the ejector rod is exposed on the tail end of the mould making base. The tail end of the punching die seat is detachably connected with a protection structure, the protection structure comprises a die sleeve, a channel is arranged in the die sleeve, the extending section of the ejector rod is inserted into the channel, the length of the ejector rod is recorded as L1, and the length of the channel is recorded as L2 and L1gt; l2gt; 0.5 L < 1 >; a rubber sleeve is arranged in the beating mold base, the ejector rod is sleeved with the rubber sleeve, and the length of the rubber sleeve is marked as L3 and L2gt; l3gt; and 0.5 L2. The device is provided with an ejector rod protection structure, so that the ejector rod is not easy to break when a slender bolt is molded.

Description

Technical Field

[0001] The invention relates to the field of cold heading equipment, in particular to a die punching tooling used on a cold heading machine. Background Art

[0002] As a high-efficiency and high-precision fastener production equipment, cold heading machine is widely used in the mass production of nuts, bolts and other parts. Its core component, the die punching tooling, mainly includes a die punching seat and an axially movable ejector. The function of the ejector is to extend from one end of the die punching seat during the forming process to squeeze the metal blank and accurately control the length of the bolt. However, this design has obvious limitations when producing small-sized bolts.

[0003] Specifically, the processing of small-size bolts requires the ejector pin to have a longer exposed length to accommodate the smaller diameter blank. In this case, the ejector pin must not only withstand huge radial and axial pressure, but also maintain a high degree of straightness and stability. However, the existing cold heading machine design does not fully take this into account, resulting in the ejector pin being easily bent or even broken under long-term, high-intensity working conditions, which not only interrupts the production process and increases maintenance costs, but may also cause product dimensional deviations, affecting the quality and consistency of the final product.

[0004] In addition, frequent replacement of the ejector rod will also affect production efficiency and increase the company's operating costs. Therefore, developing a new tooling structure that can effectively protect the ejector rod and extend its service life has become a technical problem that needs to be solved urgently. Summary of the invention

[0005] The purpose of the present invention is to provide a die punching tooling used on a cold heading machine, wherein the die punching tooling is provided with a push rod protection structure.

[0006] In order to achieve the above purpose, the technical solution adopted by the present invention is: a die punching tooling used on a cold heading machine, including a die punching seat, a push rod movably sleeved in the die punching seat, the die punching seat including a head end and a tail end, the head end and the tail end are respectively located on two opposite sides of the die punching seat, the push rod can move along the axial direction of the die punching seat, and the extended section of the push rod is exposed on the tail end of the die punching seat, the tail end of the die punching seat is detachably connected to a protective structure, the protective structure includes a die sleeve, a channel is provided in the die sleeve, the extended section of the push rod is inserted in the channel, the length of the push rod is recorded as L1, and the length of the channel is recorded as L 2 , L 1 >L 2 >0.5L 1 The die holder is provided with a rubber sleeve, which is sleeved on the ejector rod. The length of the rubber sleeve is denoted as L. 3 , L 2 >L3 >0.5L 2 .

[0007] Compared with the prior art, the advantages of the present invention are: the tooling has been optimized in design to add a push rod protection structure, which effectively solves the problem of easy breakage of the push rod during the processing of small-sized bolts. Specifically, the technical solution includes the following advantages: Push rod protection structure: The tail end of the die holder is detachably connected to a protection structure, and the protection structure includes a die sleeve, and a channel is provided in the die sleeve, and the extended section of the push rod is inserted in the channel. This design can effectively protect the push rod, reduce the risk of wear and breakage during the processing process, and extend the service life of the push rod. Reasonable channel length design: The length of the push rod is denoted as L 1 , the length of the channel is recorded as L 2 , L 1 >L 2 >0.5L 1 This design ensures that the ejector has enough room to move during processing, while not being overly exposed, thus avoiding the problem of the ejector being easily broken due to being too long. Rubber sleeve design: A rubber sleeve is set inside the die holder, and the rubber sleeve is placed on the ejector. The length of the rubber sleeve is recorded as L. 3 , L 2 >L 3 >0.5L 2 . The design of the rubber sleeve can reduce the friction between the ejector pin and the inner wall of the die holder, further protect the ejector pin, and improve the smoothness and durability of the ejector pin. Removable protection structure: The die sleeve of the protection structure is detachably connected to the tail end of the die holder. This design allows the protection structure to be replaced and maintained according to actual processing needs, improving the flexibility and adaptability of the tooling. Improve production efficiency: By adding an ejector pin protection structure, the damage and replacement frequency of the ejector pin are reduced, the continuous operation time and production efficiency of the cold heading machine are improved, and the production cost is reduced.

[0008] In some embodiments of the present invention, the ejector rod further includes a top end away from the extended section, and the rubber sleeve is sleeved on the top end of the ejector rod. This design enables the rubber sleeve to fully cover the top end of the ejector rod, further reducing the friction between the ejector rod and the inner wall of the die-making seat, improving the movement stability and durability of the ejector rod, and extending the service life of the ejector rod.

[0009] In some embodiments of the present invention, the protective structure further comprises a cushion block, which is on the die sleeve and is detachably connected to the tail end of the die punching seat. The design of the cushion block increases the stability of the protective structure and ensures that the connection between the die sleeve and the die punching seat is more secure. The design of the detachable connection allows the cushion block and the die sleeve to be replaced and maintained according to actual processing requirements, thereby improving the flexibility and adaptability of the tooling.

[0010] In some embodiments of the present invention, L2 >L 3 >0.8L 2 The length of the rubber sleeve is further optimized to ensure that the rubber sleeve can provide effective protection within the range of the ejector rod, while reducing excessive wear of the rubber sleeve and extending its service life. The lower limit value of 0.8L2 ensures that the length of the rubber sleeve is sufficient to cover the key parts of the ejector rod, improving the protection effect.

[0011] In some embodiments of the present invention, a first step is provided on the port of the channel away from the tail end, and the end of the extension section of the push rod is adaptively matched with the first step. The design of the first step enables the end of the extension section of the push rod to accurately match the port of the channel, ensuring that the push rod will not deviate or get stuck during the movement, thereby improving the movement accuracy and stability of the push rod.

[0012] In some embodiments of the present invention, a second step is provided between the connection between the cushion block and the mold sleeve. The design of the second step increases the connection strength between the cushion block and the mold sleeve, ensures the stability and reliability of the protective structure, and avoids loosening or falling off of the cushion block and the mold sleeve in a high-intensity working environment.

[0013] In some embodiments of the present invention, an inner lining is provided between the rubber sleeve and the push rod, and the friction coefficient between the inner lining and the push rod is denoted as μ 1 The friction coefficient between the rubber sleeve and the push rod is denoted as μ 2 , μ 2 >μ 1 The design of the lining reduces the direct contact between the ejector and the rubber sleeve, reduces the friction coefficient, and improves the smoothness of the ejector movement. At the same time, the high friction coefficient μ between the rubber sleeve and the ejector 2 This ensures that the ejector rod will not slide unnecessarily during movement, thereby improving the movement accuracy and stability of the ejector rod.

[0014] In some embodiments of the present invention, the push rod is cylindrical, and the diameter of the push rod is denoted as Φ, Φ>0.2L 1 The cylindrical design of the ejector ensures uniform force during the movement and improves the smoothness of the ejector. In addition, the ejector has a sufficient diameter, which enhances the mechanical strength of the ejector. During the cold heading process, the ejector needs to withstand greater pressure and impact. The larger diameter can effectively prevent the ejector from bending or breaking during the processing, thereby increasing the service life of the ejector. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0016] Figure 2 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0017] Figure 3 This is a schematic diagram of the protection structure of Example 1.

[0018] In the figure: 1. die base; 2. ejector rod; 3. protective structure; 4. extension section; 6. die sleeve; 7. channel; 8. rubber sleeve; 10. cushion block; 11. first step; 12. second step; 13. lining. DETAILED DESCRIPTION

[0019] The present invention is further described below in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0020] In the description of the present invention, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present invention.

[0021] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0022] The terms "including" and "having" and any variations thereof in the description and claims of the present invention are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0023] Embodiment 1:

[0024] like Figure 1-Figure 3As shown, a die punching tooling used in a cold heading machine includes a die punching base 1, a push rod 2 is movably sleeved in the die punching base 1, the die punching base 1 includes a head end and a tail end, the head end and the tail end are respectively located on two opposite sides of the die punching base 1, the push rod 2 can move axially along the die punching base 1, and the extension section 4 of the push rod 2 is exposed on the tail end of the die punching base 1, the tail end of the die punching base 1 is detachably connected with a protective structure 3, the protective structure 3 includes a die sleeve 6, a channel 7 is provided in the die sleeve 6, the extension section 4 of the push rod 2 is inserted in the channel 7, and the length of the push rod 2 is recorded as L 1 , the length of channel 7 is recorded as L 2 , L 1 >L 2 >0.5L 1 A rubber sleeve 8 is provided in the die holder 1, and the rubber sleeve 8 is covered on the ejector rod 2. The length of the rubber sleeve 8 is recorded as L. 3 , L 2 >L 3 >0.5L 2 .

[0025] In the above structure: the tooling has been optimized in design to add a protective structure 3 for the push rod 2, which effectively solves the problem that the push rod 2 is easily broken during the processing of small-sized bolts. Specifically, the technical solution includes the following advantages: Protective structure 3 for push rod 2: The tail end of the die holder 1 is detachably connected to the protective structure 3, and the protective structure 3 includes a die sleeve 6, and a channel 7 is provided in the die sleeve 6. The extended section 4 of the push rod 2 is inserted into the channel 7. This design can effectively protect the push rod 2, reduce the risk of wear and breakage during the processing, and extend the service life of the push rod 2. Reasonable design of the length of the channel 7: The length of the push rod 2 is denoted as L 1 , the length of channel 7 is recorded as L 2 , L 1 >L 2 >0.5L 1 This design ensures that the ejector pin 2 has enough room to move during processing, while not being overly exposed, thus avoiding the problem of the ejector pin 2 being easily broken due to being too long. Design of rubber sleeve 8: A rubber sleeve 8 is provided inside the die holder 1, and the rubber sleeve 8 is covered on the ejector pin 2. The length of the rubber sleeve 8 is recorded as L. 3 , L 2 >L 3 >0.5L 2. The design of the rubber sleeve 8 can reduce the friction between the ejector pin 2 and the inner wall of the die holder 1, further protect the ejector pin 2, and improve the movement smoothness and durability of the ejector pin 2. Removable protective structure 3: The die sleeve 6 of the protective structure 3 is detachably connected to the tail end of the die holder 1. This design allows the protective structure 3 to be replaced and maintained according to actual processing needs, thereby improving the flexibility and adaptability of the tooling. Improve production efficiency: By adding the ejector pin 2 protective structure 3, the damage and replacement frequency of the ejector pin 2 are reduced, the continuous operation time and production efficiency of the cold heading machine are improved, and the production cost is reduced.

[0026] Furthermore, the push rod 2 also includes a top end away from the extension section 4, and the rubber sleeve 8 is covered on the top end of the push rod 2. This design enables the rubber sleeve 8 to fully cover the top end of the push rod 2, further reducing the friction between the push rod 2 and the inner wall of the die-making base 1, improving the movement stability and durability of the push rod 2, and extending the service life of the push rod 2.

[0027] Embodiment 2:

[0028] The difference between Example 1 and Example 2 is that the protective structure 3 further includes a cushion block 10, which is on the die sleeve 6 and is detachably connected to the tail end of the die punching seat 1. The design of the cushion block 10 increases the stability of the protective structure 3 and ensures that the connection between the die sleeve 6 and the die punching seat 1 is more secure. The design of the detachable connection allows the cushion block 10 and the die sleeve 6 to be replaced and maintained according to actual processing requirements, thereby improving the flexibility and adaptability of the tooling.

[0029] Furthermore, L 2 >L 3 >0.8L 2 The length of the rubber sleeve 8 is further optimized to ensure that the rubber sleeve 8 can provide effective protection within the range of motion of the ejector rod 2, while reducing excessive wear of the rubber sleeve 8 and extending its service life. The lower limit value of 0.8L2 ensures that the length of the rubber sleeve 8 is sufficient to cover the key parts of the ejector rod 2, thereby improving the protection effect.

[0030] Furthermore, a first step 11 is provided on the port of the channel 7 away from the tail end, and the end of the extension section 4 of the push rod 2 is adaptively matched with the first step 11. The design of the first step 11 enables the end of the extension section 4 of the push rod 2 to accurately match with the port of the channel 7, ensuring that the push rod 2 will not deviate or get stuck during the movement, thereby improving the movement accuracy and stability of the push rod 2.

[0031] Furthermore, a second step 12 is provided between the pad 10 and the mold sleeve 6. The design of the second step 12 increases the connection strength between the pad 10 and the mold sleeve 6, ensures the stability and reliability of the protection structure 3, and avoids loosening or falling off of the pad 10 and the mold sleeve 6 in a high-intensity working environment.

[0032] Furthermore, an inner lining 13 is provided between the rubber sleeve 8 and the push rod 2, and the friction coefficient between the inner lining 13 and the push rod 2 is denoted as μ 1 The friction coefficient between the rubber sleeve 8 and the push rod 2 is denoted as μ 2 , μ 2 >μ 1 The design of the lining 13 reduces the direct contact between the push rod 2 and the rubber sleeve 8, reduces the friction coefficient, and improves the smoothness of the movement of the push rod 2. At the same time, the high friction coefficient μ between the rubber sleeve 8 and the push rod 2 2 This ensures that the push rod 2 does not slide unnecessarily during the movement, thereby improving the movement accuracy and stability of the push rod 2.

[0033] Furthermore, the push rod 2 is cylindrical, and the diameter of the push rod 2 is denoted as Φ, Φ>0.2L1. The cylindrical design of the push rod 2 ensures uniform force during the movement and improves the movement stability of the push rod 2. In addition, the push rod 2 has a sufficient diameter, thereby enhancing the mechanical strength of the push rod 2. During the cold heading process, the push rod 2 needs to withstand greater pressure and impact force. The larger diameter can effectively prevent the push rod 2 from bending or breaking during the processing process, thereby improving the service life of the push rod 2.

[0034] The above describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention to be protected. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A die punching tooling for a cold heading machine, comprising a die punching seat, wherein a push rod is movably sleeved in the die punching seat, wherein the die punching seat comprises a head end and a tail end, wherein the head end and the tail end are respectively located on two opposite sides of the die punching seat, wherein the push rod can move axially along the die punching seat, and an extended section of the push rod is exposed on the tail end of the die punching seat, wherein the push rod is characterized in that: The tail end of the die-punching seat is detachably connected to a protective structure, which includes a die sleeve. A channel is provided inside the die sleeve, and the extended section of the push rod is inserted into the channel. The length of the push rod is recorded as L1, and the length of the channel is recorded as L2, where L1>L2>0.5L1; a rubber sleeve is provided inside the die-punching seat, and the rubber sleeve is arranged on the push rod. The length of the rubber sleeve is recorded as L3, where L2>L3>0.5L2.

2. The die punching tooling used for a cold heading machine according to claim 1, characterized in that: The push rod also includes a top end away from the extended section, and the rubber sleeve is sleeved on the top end of the push rod.

3. The die punching tooling used for a cold heading machine according to claim 2, characterized in that: The protection structure also includes a cushion block, which is on the mold sleeve and is detachably connected to the tail end of the mold punching seat.

4. The die punching tooling used for a cold heading machine according to claim 3, characterized in that: L2>L3>0.8L2.

5. The die punching tooling used for a cold heading machine according to claim 1, characterized in that: A first step is arranged on the port of the channel away from the tail end, and the end of the extended section of the push rod is adaptively matched with the first step.

6. The die punching tooling used for a cold heading machine according to claim 4, characterized in that: A second step is provided between the connection between the cushion block and the mold sleeve.

7. The die punching tooling used for a cold heading machine according to claim 4, characterized in that: An inner lining is provided between the rubber sleeve and the push rod, the friction coefficient between the inner lining and the push rod is denoted as μ1, the friction coefficient between the rubber sleeve and the push rod is denoted as μ2, and μ2>μ1.

8. The die punching tooling used for a cold heading machine according to claim 1, characterized in that: The push rod is cylindrical, and the diameter of the push rod is denoted as Φ, Φ>0.2L1.

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