Oblique arc self-adaptive pre-tightening expansion device

Abstract

The utility model provides an inclined arc self-adaptive pre-tightening expansion device which is arranged between a die and a die holder of an oil press, so that the die and the die holder are locked. The inclined arc self-adaptive pre-tightening expansion device comprises a wedge block I and a wedge block II, the width of the wedge block I is gradually reduced from the first end to the second end, and the width of the wedge block II is gradually reduced from the first end to the second end; the first end of the wedge block I is in contact with the second end of the wedge block II, and is positioned between the die and the die holder; the second end of the first wedge block makes contact with the first end of the second wedge block and is located on the outer side of the mold and the mold base. According to the oblique arc self-adaptive pre-tightening expansion device, the nut is pre-tightened, the disc spring set is compressed, the first wedge block and the second wedge block slide relatively, transverse expansion of the oblique arc self-adaptive pre-tightening expansion device is achieved, a mold and a mold base are locked, the oblique arc self-adaptive pre-tightening expansion device is small and exquisite in structure and easy and convenient to operate, and the wedge blocks can be pre-tightened only by one person through a wrench.

Description

Technical Field

[0001] The utility model belongs to the technical field of mold locking, and particularly relates to an inclined arc self-adaptive pre-tightening expansion device. Background Technique

[0002] Generally, a mold of a hydraulic press is locked with a die holder through a wedge block. When installing the wedge block, a crane and a sledgehammer are needed to knock the wedge block into the gap between the mold and the die holder to realize the locking of the mold. The contact surfaces of the wedge block with the mold and the die holder are flat surfaces, and the size of the wedge block should match the flat surfaces of the mold and the die holder. However, this locking method has relatively high requirements for the machining accuracy of the wedge block. When replacing the mold, due to the machining errors of different molds, the versatility of the wedge block is poor, affecting the locking effect. Moreover, the locking operation with a single wedge block is complex, the installation cost is high, and there are safety hazards during installation. Content of the Utility Model

[0003] In order to solve the problems existing in the prior art, the utility model aims to provide an inclined arc self-adaptive pre-tightening expansion device, which solves the problems of complex operation and high installation cost when the existing mold and die holder are locked, and can realize the rapid locking and loosening of different molds and die holders.

[0004] To achieve the above object, the technical solution of the utility model is realized as follows:

[0005] An inclined arc self-adaptive pre-tightening expansion device is arranged between the mold and the die holder of a hydraulic press to lock the mold and the die holder. The pre-tightening expansion device includes a first wedge block and a second wedge block. The width of the first wedge block gradually decreases from the first end to the second end, and the width of the second wedge block gradually decreases from the first end to the second end.

[0006] It further includes a screw, a conical pin, a ball seat, a disc spring group, a spherical washer and a nut. A pin hole is provided at the first end of the first wedge block, and a fixing hole is provided at the first end of the second wedge block. A through hole for the screw to pass through is provided between the pin hole and the fixing hole. One end of the screw is limited in the pin hole through the conical pin, and the other end sequentially passes through the first wedge block, the second wedge block, the ball seat, the disc spring group, the spherical washer and then is threadedly connected and locked with the nut to realize the locking of the mold and the die holder. Among them, a part of the ball seat, the disc spring group, the spherical washer and the nut is located in the fixing hole, and the other part of the nut is located outside the second wedge block.

[0007] Further, the contact surface between the first wedge block and the second wedge block is an arc surface.

[0008] Further, a first limiting groove is provided on the arc surface of the first wedge block, and a second limiting groove is provided on the arc surface of the second wedge block. The first limiting groove and the second limiting groove are communicated. A positioning sleeve for pre-positioning the first wedge block and the second wedge block is arranged in the first limiting groove and the second limiting groove, and the screw passes through the positioning sleeve.

[0009] Further, the length of the second limiting groove is greater than that of the first limiting groove.

[0010] Further, the end face of the nut in contact with the spherical washer is spherical.

[0011] Further, a first groove is circumferentially formed on the outer surface of the nut, and a second groove is formed on the inner surface of the fixing hole. After the nut pre-tightens the first wedge block and the second wedge block, a retaining ring is embedded in the second groove and is placed in the first groove to stop the nut.

[0012] Further, the retaining ring is a wire retaining ring for holes.

[0013] Further, a lifting lug for lifting is installed after the screw rod passes through the nut.

[0014] Further, a first disassembly hole for disassembly is formed on the surface of the conical pin, and a second disassembly hole matching the first disassembly hole is formed on the first wedge block.

[0015] Compared with the prior art, the inclined arc self-adaptive pre-tightening expansion device of the present invention has the following advantages:

[0016] (1) For the inclined arc self-adaptive pre-tightening expansion device of the present invention, by pre-tightening the nut and compressing the disc spring group, the second wedge block and the first wedge block slide relative to each other, realizing the lateral expansion of the device and completing the locking of the mold and the mold base. The structure is small and the operation is simple and convenient. Only one person can use a wrench to pre-tighten the wedge block.

[0017] (2) For the inclined arc self-adaptive pre-tightening expansion device of the present invention, the contact surfaces of the first wedge block and the second wedge block are arc surfaces, which can realize self-aligning, have a higher contact rate, strong self-adaptability, can adjust the angle and expansion distance, have a wider adaptation range, lower processing accuracy requirements, greatly reduce the mold replacement time, improve production efficiency and reduce the production cost of enterprises.

[0018] (3) For the inclined arc self-adaptive pre-tightening expansion device of the present invention, through the cooperation of the first limiting groove, the second limiting groove and the positioning sleeve, the first wedge block and the second wedge block can be pre-positioned to prevent the first wedge block and the second wedge block from moving. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0020] Figure 1 is the overall structural schematic diagram provided by the embodiment of the present invention;

[0021] Figure 2 Side view of Figure 1 ;

[0022] Figure 3 Profile view A-A in Figure 2 ;

[0023] Figure 4 Partial enlarged view C in Figure 3 ;

[0024] Figure 5 Top view of the overall structure provided by the embodiment of the present utility model;

[0025] Figure 6 Sectional view B-B in Figure 5 ;

[0026] Figure 7 Schematic diagram of the device installation provided by the embodiment of the present utility model.

[0027] Explanation of reference numerals:

[0028] 1, Mold; 2, Mold base; 3, Wedge block 1; 31, Limit groove 1; 4, Wedge block 2; 41, Groove 2; 42, Limit groove 2; 5, Screw; 6, Cone pin; 61, Disassembly hole 1; 62, Disassembly hole 2; 7, Ball seat; 8, Disc spring group; 9, Spherical pad; 10, Nut; 101, Groove 1; 11, Lifting lug; 12, Positioning sleeve. Specific implementation mode

[0029] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0030] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first", "second", etc. can explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0031] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0032] The present utility model will be described in detail below with reference to the drawings and in conjunction with embodiments.

[0033] As Figures 1 to 7 shown, an inclined arc self-adaptive pre-tightening expansion device is provided between the mold 1 and the die holder 2 of a hydraulic press to lock the mold 1 and the die holder 2; the pre-tightening expansion device includes a first wedge 3 and a second wedge 4, the width of the first wedge 3 gradually decreases from the first end to the second end, and the width of the second wedge 4 gradually decreases from the first end to the second end;

[0034] It further includes a screw 5, a taper pin 6, a ball seat 7, a disc spring group 8, a spherical washer 9, and a nut 10. A pin hole is provided at the first end of the first wedge 3, a fixing hole is provided at the first end of the second wedge 4, and a through hole for the screw 5 to pass through is provided between the pin hole and the fixing hole; one end of the screw 5 is limited in the pin hole by the taper pin 6, and the other end sequentially passes through the first wedge 3, the second wedge 4, the ball seat 7, the disc spring group 8, the spherical washer 9 and is threadedly connected and locked with the nut 10 to realize the locking of the mold and the die holder; wherein, a part of the ball seat 7, the disc spring group 8, the spherical washer 9, and the nut 10 is located in the fixing hole, and the other part of the nut 10 is located outside the second wedge 4.

[0035] For the inclined arc self-adaptive pre-tightening expansion device of the present utility model, by pre-tightening the nut and compressing the disc spring group, the first wedge and the second wedge slide relative to each other to realize the lateral expansion of the device and complete the locking of the mold and the die holder. The structure is small and the operation is simple and convenient. Only one person can use a wrench to realize the pre-tightening of the wedge.

[0036] In a preferred embodiment of the present utility model, the surfaces of the first wedge 3 and the second wedge 4 in contact with each other are arc surfaces.

[0037] During actual use, the second wedge 4 moves relative to the first wedge 3 along the arc surface to realize the lateral expansion of the device.

[0038] In a preferred embodiment of the present utility model, a first limiting groove 31 is formed on the arc surface of the first wedge block 3, and a second limiting groove 42 is formed on the arc surface of the second wedge block 4. The first limiting groove 31 communicates with the second limiting groove 42. A positioning sleeve 12 for pre-positioning the first wedge block 3 and the second wedge block 4 is arranged in the first limiting groove 31 and the second limiting groove 42, and the screw rod 5 passes through the positioning sleeve 12.

[0039] During actual use, through the cooperation of the first limiting groove 31, the second limiting groove 42 and the positioning sleeve 12, the first wedge block 3 and the second wedge block 4 are pre-positioned to prevent the first wedge block 3 and the second wedge block 4 from moving and shifting too much in position before pre-tightening of the device.

[0040] In a preferred embodiment of the present utility model, the length of the second limiting groove 42 is greater than the length of the first limiting groove 31.

[0041] During actual use, the lengths of both the second limiting groove 42 and the first limiting groove 31 are greater than the length of the positioning sleeve 12, enabling the positioning sleeve to move within the two grooves to adjust the positions of the first wedge block 3 and the second wedge block 4; the length of the second limiting groove 42 is greater than the length of the first limiting groove 31, allowing the second wedge block 4 and the first wedge block 3 to slide relative to each other, realizing the self-adjustment of the inclined arc surfaces of the second wedge block 4 and the first wedge block 3, thereby achieving simple and rapid locking between the hydraulic press die 1 and the die base 2.

[0042] In a preferred embodiment of the present utility model, the end face of the nut 10 in contact with the spherical washer 9 is spherical.

[0043] During actual use, the end face of the nut 10 in contact with the spherical washer 9 is spherical, and the flexible connection and synchronous inclination of the nut 10 and the screw rod 5 are ensured through spherical adjustment; a spherical washer 9 is arranged between one end of the disc spring group 8 and the nut 10 to prevent the nut 10 from not being in full contact with the disc spring group 8 when the screw rod 5 and the nut 10 are inclined, affecting the pressing effect of the disc spring group 8; a ball seat 7 is arranged at the other end of the disc spring group 8 to prevent the disc spring group 8 from not being in full contact with the plane when the screw rod 5 and the disc spring group 8 are inclined, affecting the pressing effect of the disc spring group 8.

[0044] In a preferred embodiment of the present utility model, a first groove 101 is circumferentially formed on the outer surface of the nut 10, and a second groove 41 is formed on the inner surface of the fixing hole. After the nut 10 pre-tightens the first wedge block 3 and the second wedge block 4, a retaining ring is embedded in the second groove 41 and placed in the first groove 101 to stop the nut.

[0045] The retaining ring is a wire retaining ring for holes.

[0046] During actual use, the reference standard for the retaining ring is GB959.2 - 86 wire retaining ring. The retaining ring is of an open type and is installed in the second groove 41 and the first groove 101 to limit the nut 10.

[0047] In a preferred embodiment of the present utility model, a lifting lug 11 for lifting is installed after the screw rod 5 passes through the nut 10.

[0048] During actual use, the screw rod 5 and the lifting lug 11 are detachably connected and can be detached when the device does not need to be lifted.

[0049] In a preferred embodiment of the present utility model, the first wedge block 3 and the second wedge block 4 have the same length.

[0050] In a preferred embodiment of the present utility model, a first disassembly hole 61 for disassembly is formed on the surface of the conical pin 6, and a second disassembly hole 62 matching the first disassembly hole 61 is formed on the first wedge block 3.

[0051] During actual use, the conical pin 6 is disassembled through the first disassembly hole 61 and the second disassembly hole 62.

[0052] Working principle of the inclined arc self-adaptive pre-tightening expansion device:

[0053] Install this device between the mold 1 and the mold base 2 of the hydraulic press. Pre-tighten the nut 10 with a wrench to compress the disc spring group 8. The compressed disc spring group 8 pushes the second wedge block 4 to move relative to the first wedge block 3 along the arc surface, realizing the lateral expansion of the device until the contact surfaces of the first wedge block 3 and the second wedge block 4 with the mold 1 and the mold base 2 are completely fitted and do not move, completing the locking of the mold 1 and the mold base 2.

[0054] When the mold needs to be loosened, loosen the nut 10 with a wrench, the disc spring group 8 rebounds, and the arc surfaces in contact with the first wedge block 3 and the second wedge block 4 are loosened, so that a gap is generated between the contact surfaces of the first wedge block 3 and the second wedge block 4 with the mold 1 and the mold base 2, realizing the separation of the mold 1 and the mold base 2.

[0055] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An oblique arc adaptive pre-tightening and bulging device, the pre-tightening and bulging device is arranged between a mold (1) and a mold base (2) of a hydraulic press to lock the mold (1) and the mold base (2); the pre-tightening and bulging device comprises a wedge block 1 (3) and a wedge block 2 (4), the width of the wedge block 1 (3) gradually decreases from the first end to the second end, and the width of the wedge block 2 (4) gradually decreases from the first end to the second end; the characteristics are: It also includes a screw (5), a conical pin (6), a ball seat (7), a disc spring group (8), a spherical pad (9) and a nut (10). The first end of the wedge block (3) is provided with a pin hole, and the first end of the wedge block (4) is provided with a fixing hole. A through hole for the screw (5) to pass through is provided between the pin hole and the fixing hole. One end of the screw (5) is limited in the pin hole by the conical pin (6), and the other end passes through the wedge block (3), the wedge block (4), the ball seat (7), the disc spring group (8), and the spherical pad (9) in sequence, and is threadedly connected with the nut (10) and locked, so as to achieve locking of the mold and the mold base. Part of the ball seat (7), the disc spring group (8), the spherical pad (9) and the nut (10) are located in the fixing hole, and the other part of the nut (10) is located outside the wedge block (4).

2. The oblique arc adaptive pre-tightening expansion device according to claim 1 is characterized in that: The contact surface between the wedge block 1 (3) and the wedge block 2 (4) is an arc surface.

3. The oblique arc adaptive pre-tightening expansion device according to claim 2 is characterized in that: The arc surface of the wedge block 1 (3) is provided with a limiting groove 1 (31), and the arc surface of the wedge block 2 (4) is provided with a limiting groove 2 (42). The limiting groove 1 (31) and the limiting groove 2 (42) are connected. Positioning sleeves (12) for pre-positioning the wedge block 1 (3) and the wedge block 2 (4) are arranged in the limiting groove 1 (31) and the limiting groove 2 (42), and the screw rod (5) passes through the positioning sleeves (12).

4. The oblique arc adaptive pre-tightening expansion device according to claim 3 is characterized in that: The length of the second limiting groove (42) is greater than the length of the first limiting groove (31).

5. The oblique arc adaptive pre-tightening expansion device according to claim 1 is characterized in that: The end surface of the nut (10) at the end in contact with the spherical pad (9) is a spherical surface.

6. The oblique arc adaptive pre-tightening expansion device according to claim 1 is characterized in that: The outer surface of the nut (10) is provided with a groove 1 (101) in the circumferential direction, and the inner surface of the fixing hole is provided with a groove 2 (41). When the nut (10) pre-tightens the wedge block 1 (3) and the wedge block 2 (4), a retaining ring is embedded in the groove 2 (41) and is placed in the groove 1 (101) to stop the nut.

7. The oblique arc adaptive pre-tightening expansion device according to claim 6 is characterized in that: The retaining ring is a steel wire retaining ring for a hole.

8. The oblique arc adaptive pre-tightening expansion device according to claim 1 is characterized in that: After the screw rod (5) passes through the nut (10), a lifting lug (11) for lifting is installed.

9. The oblique arc adaptive pre-tightening expansion device according to claim 1, characterized in that: The surface of the conical pin (6) is provided with a disassembly hole (61) for disassembly, and the wedge block (3) is provided with a disassembly hole (62) matching with the disassembly hole (61).

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