Lock nut small end face pressure and torsion point die and system

Abstract

This utility model relates to the field of hydraulic stamping forming, and in particular to a locking nut small end face torque point mold and system. The locking nut small end face torque point mold includes a base, on which a pressure point assembly and a touch-sensitive spring-loaded assembly are spaced apart. The pressure point assembly includes a lower die base, within which a pressure point cutting block is disposed. A die core is slidably sleeved between the pressure point cutting block and the lower die base, and a pressure rod is disposed on the die core. The touch-sensitive spring-loaded assembly includes a support plate, on which a contact sensor that cooperates with the pressure rod is detachably connected. This utility model, after process verification, significantly simplifies the installation and debugging process, effectively reduces operational difficulty and manual workload, and improves production line efficiency.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic press stamping, and in particular to a locking nut small end face torque point mold and system. Background Technology

[0002] Currently, many domestic manufacturers use large-tonnage stamping presses (such as 80-ton presses) with simple stamping dies, or small benchtop hydraulic presses (such as 5-ton / 10-ton presses) with split dies for twist point pressing. Both methods heavily rely on the press stroke to control the twist point depth. However, the stroke control of existing technologies is inherently inaccurate and fluctuates greatly; coupled with the difficulty in ensuring absolute accuracy and verticality of the position each time the die is placed and adjusted manually, this leads to two key problems: firstly, the twist point depth is inconsistent between batches of products; and secondly, the twist point position is prone to skewness.

[0003] The direct consequence of these two process defects is a very large fluctuation range in the torque value of the nut. This is because even slight differences in the depth and position of the torque point directly determine the torque performance. Unstable torque directly increases the defect rate, causing significant quality and economic losses.

[0004] Therefore, those skilled in the art are dedicated to developing a locking nut small end face torque point mold and system that is easy to operate and has high riveting accuracy. Utility Model Content

[0005] In view of the above-mentioned defects of the prior art, the technical problem to be solved by this utility model is to provide a locking nut small end face torque point mold and system.

[0006] To achieve the above objectives, this utility model provides a locking nut small end face torque point mold, including a base, on which a pressure point assembly and a touch-sensitive spring-loaded assembly are spaced apart; the pressure point assembly includes a lower mold base, in which a pressure point cutter block is provided, and a mold core is slidably sleeved on the outside of the pressure point cutter block, and a pressure rod is provided on the mold core; the touch-sensitive spring-loaded assembly includes a support bend plate, on which a contact sensor that can cooperate with the pressure rod is detachably connected.

[0007] Preferably, the lower mold base is provided with at least one set of guide grooves that cooperate with the pressure rod, one end of the pressure rod is screwed to the mold core, and the other end extends out of the lower mold base through the guide groove.

[0008] Preferably, the inner wall of the lower mold base is provided with a radially extending limiting boss.

[0009] Preferably, the end of the pressure point cutting block away from the mold core is provided with a limiting plate that cooperates with the limiting boss.

[0010] Preferably, the mold core has a receiving groove on the side near the base, and an elastic element is provided in the receiving groove. One end of the elastic element is located in the receiving groove, and the other end is connected to the limiting boss.

[0011] Preferably, the cross-section of the pressure point blade is non-circular.

[0012] Preferably, the mold core has a clearance step at the end away from the base that cooperates with the nut to be processed.

[0013] This utility model also provides a locking nut small end face torque point system, including the locking nut small end face torque point mold as described above.

[0014] Preferably, it also includes an upper mold joint that is coaxially arranged with the lower mold base.

[0015] The beneficial effects of this utility model are as follows: Through process verification, this utility model significantly simplifies the installation and debugging process, effectively reduces operational difficulty and manual workload, and improves production line efficiency. In the application of press-fit products, it not only achieves precise control of the torque depth and position of the nut end face, ensuring product quality consistency, but also greatly improves the product qualification rate. Ultimately, it significantly reduces unit production costs and enhances the product's economic competitiveness. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of a specific embodiment of the present invention.

[0017] Figure 2 This is a side view of a specific embodiment of the present invention.

[0018] Figure 3 yes Figure 2 A schematic diagram of the cross-sectional structure of AA.

[0019] Figure 4 This is a schematic diagram of the locking nut small end face torque point system in a specific embodiment of this utility model.

[0020] Figure 5 This is a schematic diagram of the mold core in a specific embodiment of this utility model.

[0021] 1. Base; 11. Pressing point assembly; 111. Lower mold base; 111a. Guide groove; 111b. Limiting boss; 111c. Skirt; 112. Pressing point tool block; 112a. Limiting plate; 113. Mold core; 113a. Receiving groove; 113a1. Elastic element; 113b. Relief step; 114. Pressing rod; 12. Touch rebound assembly; 121. Supporting bending plate; 122. Contact sensor; 2. Upper mold connector; 3. Workpiece to be processed. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments. It should be noted that in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only for the convenience of describing the present invention and for simplifying the description, and 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 manner. Therefore, they should not be construed as limitations on the present invention. Terms such as "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] like Figure 1-5 As shown, a locking nut small end face torque-pressing mold includes a base 1. In this embodiment, the base 1 serves as the mounting foundation, on which a pressing point assembly 11 and a touch-sensitive spring-loaded assembly 12 are spaced apart. The pressing point assembly 11 includes a lower mold base 111, which is generally hollow tubular and has a skirt 111c at the bottom for screwing to the base 1. The lower mold base 111 contains a pressing point cutter block 112 with a non-circular cross-section, which is coaxially arranged with the lower mold base 111. In this embodiment, the pressing point cutter block 112 has a regular hexagonal cross-section. The design of the regular hexagonal pressing point cutter block 112 effectively avoids tool rotation while its six corners form natural cutting edges, making stress concentration more precise during pressing. A sliding cavity is formed between the outer wall of the pressure-pointing cutter block 112 and the inner wall of the lower die base 111. A die core 113 is slidably sleeved on the pressure-pointing cutter block 112, and a pressure rod 114 is provided on the die core 113. The pressure rod 114 can slide up and down along the pressure-pointing cutter block 112 within the sliding cavity with the die core 113. In this embodiment, the sliding fit is a clearance fit. The touch-sensitive rebound assembly 12 includes a support bend plate 121. The support bend plate 121 serves as a mounting base, on which a contact sensor 122 that can cooperate with the pressure rod 114 is detachably connected. By setting the contact sensor 122 and electrically connecting it to the punch press (not shown in the figure), when the pressure rod 114 contacts the contact sensor 122, it proves that the riveting is in place. At this time, the contact sensor 122 feeds back the signal to the punch press, thereby stopping the stroke. In this embodiment, the detachable connection is a screw connection. Other similar connection methods such as snap-fit ​​or magnetic connection can also be used in other embodiments. The detachable connection design allows the height of the contact sensor 122 to be adjusted, thus ensuring the accuracy of the riveting dimensions. It also facilitates future replacement and maintenance.

[0024] In this embodiment, the lower mold base 111 is provided with two sets of guide grooves 111a extending axially along the lower mold base 111. In other embodiments, at least one set may also be provided. The guide grooves 111a guide the pressure rod 114. Specifically, one end of the pressure rod 114 is screwed to the mold core 113, and the other end extends out of the lower mold base 111 through the guide groove 111a. This arrangement allows the pressure rod 114 to slide up and down along the guide groove 111a with the mold core 113, thereby triggering the contact sensor 122.

[0025] The inner wall of the lower mold base 111 is also provided with a radially extending limiting boss 111b, and the limiting boss 111b has a through hole that mates with the pressing point cutter block 112. The end of the pressing point cutter block 112 away from the mold core 113 is provided with a limiting plate 112a that mates with the limiting boss 111b. In this embodiment, the limiting plate 112a is quadrilateral and integrally formed with the pressing point cutter block 112. This design not only ensures reliable workpiece positioning, but also prevents damage to the cutter when pressing the torsion point.

[0026] The mold core 113 has a receiving groove 113a on the side near the base 1. An elastic element 113a1 is provided within the receiving groove 113a, with one end of the elastic element 113a1 located within the receiving groove 113a and the other end connected to a limiting boss 111b. In this embodiment, the elastic element 113a1 is a compression spring, and when the compression spring extends freely, the pressure rod 114 abuts against the top of the guide groove 111a. The mold core 113 has a clearance step 113b at the end away from the base 1, which cooperates with the nut to be processed. The clearance step 113b facilitates the placement of the workpiece 3 to be processed.

[0027] This utility model also provides a locking nut small end face torque point system, including the locking nut small end face torque point mold as described above, and also includes an upper mold joint 2 coaxially arranged with the lower mold base 111.

[0028] In operation, the part to be processed is first placed and fixed on the mold core 113, and then the equipment is started. The upper mold joint 2 pushes the mold core 113 to move axially along the lower mold base 111. As the mold core 113 moves downward under pressure, the pressure rod 114 moves synchronously along the guide groove 111a. At this time, the elastic element 113a1 is gradually compressed. When the end of the pressure rod 114 contacts the contact sensor 122, it indicates that the part to be processed 3 has been pressed into position. The contact sensor 122 transmits a signal to the electronic control device (not shown in the figure). The punch press receives the signal and stops pressing downward, and then returns to its original position. At the same time, the mold core 113 is pushed back to its original position under the elastic reset action of the elastic element 113a1. At this time, the workpiece is removed. Through these operations, products with the required twist point depth and position are pressed out.

[0029] This application, after process verification, significantly simplifies the installation and commissioning process, effectively reduces operational difficulty and manual workload, and improves production line efficiency. In press-fit products, it not only achieves precise control of the nut end face torque depth and position, ensuring product quality consistency, but also greatly improves the product qualification rate. Ultimately, it significantly reduces unit production costs and enhances the product's economic competitiveness.

[0030] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A locking nut small end face torque point mold, characterized in that: Includes a base (1), on which pressure point assembly (11) and touch rebound assembly (12) are spaced apart; The pressure point assembly (11) includes a lower mold base (111), a pressure point cutter block (112) is provided inside the lower mold base (111), a mold core (113) is slidably sleeved outside the pressure point cutter block (112), and a pressure rod (114) is provided on the mold core (113). The touch rebound assembly (12) includes a support bend (121) on which a contact sensor (122) that can cooperate with the pressure rod (114) is detachably connected.

2. The locking nut small end face torque point mold as described in claim 1, characterized in that: The lower mold base (111) is provided with at least one set of guide grooves (111a) that cooperate with the pressure rod (114). One end of the pressure rod (114) is screwed to the mold core (113), and the other end extends out of the lower mold base (111) through the guide groove (111a).

3. The locking nut small end face torque point mold as described in claim 1 or 2, characterized in that: The inner wall of the lower mold base (111) is provided with a radially extending limiting boss (111b).

4. The locking nut small end face torque point mold as described in claim 3, characterized in that: The pressure point cutter block (112) has a limiting plate (112a) that cooperates with the limiting boss (111b) at the end away from the mold core (113).

5. The locking nut small end face torque point mold as described in claim 3, characterized in that: The mold core (113) has a receiving groove (113a) on the side near the base (1). An elastic element (113a1) is provided in the receiving groove (113a). One end of the elastic element (113a1) is located in the receiving groove (113a), and the other end is connected to the limiting boss (111b).

6. The locking nut small end face torque point mold as described in claim 1, characterized in that: The cross-section of the pressure point knife block (112) is non-circular.

7. The locking nut small end face torque point mold as described in claim 1, characterized in that: The mold core (113) has a clearance step (113b) at the end away from the base (1) to cooperate with the nut to be processed.

8. A locking nut small end face torque point system, characterized in that: Including the locking nut small end face torque point mold as described in any one of claims 1-7.

9. The locking nut small end face torque point system as described in claim 8, characterized in that: It also includes an upper mold joint (2) that is coaxially arranged with the lower mold base (111).

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