CN214290483U - Necking clamp - Google Patents

Abstract

The utility model relates to a throat anchor clamps, including last mould fixed block, last mould benevolence, locating piece, lower mould benevolence, lower mould fixed block, lower bolster, spring, it sets up to go up mould benevolence go up mould fixed block lower extreme, lower mould benevolence sets up lower mould fixed block upper end, the lower mould fixed block is fixed on the lower bolster, it is provided with the throat face to go up mould benevolence lower extreme, lower mould benevolence upper end is provided with the throat face down, the spring sets up in the lower mould fixed block, the locating piece sets up on the spring, the locating piece can axial motion under the effect of spring. The utility model discloses a set up unsteady location demoulding structure, simplified the anchor clamps structure, reduced anchor clamps manufacturing cost, improved throat efficiency, guaranteed the throat quality simultaneously.

Description

Necking clamp

Technical Field

The utility model relates to a throat anchor clamps field, concretely relates to throat anchor clamps of long rod type product.

Background

In the valve industry, particularly needle valves, there are often long stem assemblies that require necking, such as riveting a metal stem to a non-metal valve head. Part valve rod subassembly requires that the length of throat is longer or the throat tapering is less, also or throat intensity is higher, and to this type of valve rod subassembly, it can't produce with present conical throat anchor clamps almost, and the product can be because of "awl tightly" can't take out in anchor clamps, and the valve rod subassembly size of processing out hardly satisfies the requirement, and anchor clamps are also easy wearing and tearing in addition, and life is low.

SUMMERY OF THE UTILITY MODEL

In order to solve the not enough of prior art, the utility model provides a throat anchor clamps, including last mould fixed block, last mould benevolence, locating piece, lower mould benevolence, lower mould fixed block, lower bolster, spring, it sets up to go up mould benevolence go up mould fixed block lower extreme, lower mould benevolence sets up lower mould fixed block upper end, the lower mould fixed block is fixed on the lower bolster, it is provided with the throat face to go up mould benevolence lower extreme, lower mould benevolence upper end is provided with the throat face down, the spring sets up in the lower mould fixed block, the locating piece sets up on the spring, the locating piece can axial motion under the effect of spring.

Furthermore, the upper die core and the lower die core have the same structure.

The utility model has the advantages that the floating positioning demoulding structure simplifies the structure of the clamp and reduces the manufacturing cost of the clamp; the necking strength, taper and length can be well controlled, and the batch consistency of products is high; the production efficiency is high, the service life of the clamp is long, and the universality is good.

Drawings

Fig. 1 is an exploded perspective view of the necking down jig of the present invention;

fig. 2 is a sectional view of the necking down jig of the present invention;

fig. 3 is a top view of the present invention with the upper die assembly and the lower die plate removed;

Detailed Description

In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.

Referring to the attached drawings 1-3, the utility model comprises an upper die fixing block 2, an upper die core 3, a positioning block 6, a lower die core 7, a lower die fixing block 9, a lower template 14 and a spring 12. The upper end of the upper die fixing block 2 is provided with a cylindrical die shank 1 connected with a die shank hole of the manual punching machine, and the lower end is provided with a positioning groove 19 with a downward opening. The upper die core 3 is arranged in the positioning groove 19, and the upper die core 3 is connected with the upper die fixing block 2 in a locking way through a fastening screw 18. The lower end of the upper die core 3 is provided with an upper necking surface 23 which gradually draws inwards. The lower end of the lower die fixing block 9 is arranged in a central hole 11 of a lower die plate 14 and is locked with the lower die plate 14 through a fastening screw 15, and a U-shaped groove 10 connected with a bottom plate of a manual punch press is arranged on the lower die plate 14. The upper end of the lower die fixing block 9 is provided with a positioning groove 8 with an upward opening, the lower die core 7 is arranged in the positioning groove 8, and the lower die core 7 is tightly connected with the lower die fixing block 9 through a fastening screw 16. The upper end of the lower die core 7 is provided with a lower necking surface 24 which gradually converges inwards. In order to effectively reduce the manufacturing cost of the clamp, in a preferred scheme, the upper mold core 3 and the lower mold core 7 can be manufactured by adopting the same structure.

The positioning block 6 comprises a clamping section 25 and a connecting guide section 17, the connecting guide section 17 is arranged in a round hole 21 on the lower die fixing block 9, and the round hole 21 is communicated with the positioning groove 8. The round hole 21 is communicated with a threaded hole 20 downwards, a spring 12 is arranged in the threaded hole 20, a fastening screw 13 is arranged at the tail end of the threaded hole 20, and the fastening screw 13 can adjust the pre-pressing amount of the elastic element 12.

During assembly, the connecting guide section 17 of the positioning block 6 is inserted into the circular hole 21 on the lower die fixing block 9, the lower die core 7 is placed into the positioning groove 8 at the upper end of the lower die fixing block 9, the side surface 22 of the lower die core 7 is tightly attached to the positioning surface of the positioning block 6, and the lower die core 7 is locked by the fastening screw 16. The positioning block 6 is centered through the round hole 21, and the positioning block 6 can move up and down along the axis of the round hole 21 but cannot rotate through the orientation of the side surface 22 of the lower die core 7. The upper die core 3 is placed into a positioning groove 19 at the lower end of the upper die fixing block 2, the relative position of the upper die core 3 and the upper die fixing block 2 is adjusted, the upper die fixing block 2 and the lower die fixing block 9 are coaxial visually, and then the upper die core 3 is locked by a fastening screw 18. The spring 12 is then inserted into the threaded hole 20 and locked with the fastening screw 13. And finally, inserting the lower die fixing block 9 into the central hole 11 of the lower die plate 14, and locking by using a fastening screw 15.

Treat the utility model discloses the equipment is accomplished the back, links together die shank 1 and manual punch press, adjusts lower mould component's direction and position, makes it coaxial, syntropy with last mould component. The valve rod assembly (the valve rod 4 and the valve head 5) is horizontally placed in the clamping section 25 of the positioning block 6, and the flywheel of the manual punch press is manually rotated, so that the upper die core 3 presses the valve head assembly to be shrunk along the upper shrinking opening surface 23 of the upper die core 3 and the lower shrinking opening surface 24 of the lower die core 7. After one necking step is completed, the valve rod assembly is rotated by 50-140 degrees, and necking is performed again. After necking, the flywheel of the manual punch is manually rotated to separate the upper die core from the lower die core, the positioning block 6 is automatically demoulded under the action of the spring 12, and the valve head assembly after necking is horizontally taken out from the clamping section 25 of the positioning block 6.

The upper die fixing block 2 and the lower die fixing block 9 can be made of Cr12 or 45# steel and are subjected to thermal refining to HRC32-48 degrees. The upper die core 3 and the lower die core 7 are made of Cr12MoV and are subjected to heat treatment until the temperature reaches HRC52-62 degrees. The lower platen 14 may be made of any material, such as Q235, 45# steel, stainless steel tailings, and the like. The positioning block 6 is made of brass. The fastening screws 13, 15, 16 and 18 are standard screws, and the fastening screws 16 and 18 can be respectively provided with two groups, one group is used for locking and the other group is used for preventing loosening. The matching precision of the upper die core 3 and the upper die fixing block 2 and the matching precision of the lower die core 7 and the lower die fixing block 9 are both H9/H8, the matching precision of the guide connecting section 17 of the positioning block 6 and the round hole 21 of the lower die fixing block 9 is H7/H6, and the matching precision of the positioning block 6 and the product 4 is H7/H6.

The invention has been described with reference to the preferred embodiments, to the above examples which are not intended to limit the invention, and from reading the present description, those skilled in the art will be able to conceive of numerous modifications and variations to this structure, without departing from the inventive concept, any obvious alternative falling within the scope of the invention.

Claims (2)

1. The utility model provides a necking down anchor clamps, includes last mould fixed block (2), goes up mould benevolence (3), locating piece (6), lower mould benevolence (7), lower mould fixed block (9), lower bolster (14), spring (12), its characterized in that it sets up to go up mould benevolence (3) go up mould fixed block (2) lower extreme, lower mould benevolence (7) set up lower mould fixed block (9) upper end, lower mould fixed block (9) are fixed on lower bolster (14), it is provided with necking down face (23) to go up mould benevolence (3) lower extreme, lower mould benevolence (7) upper end is provided with necking down face (24), spring (12) set up in lower mould fixed block (9), locating piece (6) set up on spring (12), locating piece (6) can axial motion under the effect of spring (12).

2. The necking jig of claim 1, wherein the upper mold core (3) and the lower mold core (7) have the same structure.

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