Multi-station displacement driving mechanism for movable die frame of cold heading machine

Abstract

The invention relates to a multi-station displacement driving mechanism for a movable mold frame of a cold heading machine. The multi-station displacement driving mechanism comprises a crank oscillating bar mechanism, a cam plate, a connecting rod and the movable mold frame, the cam plate is provided with a cam groove formed in the horizontal direction, the cam groove is a multi-section stepped groove which is staggered and continuous in the vertical direction, the lower end of the connecting rod is installed in the cam groove through a roller, and the upper end of the connecting rod is provided with a horizontal guide mechanism. The lower end of the movable mold frame is movably mounted in the horizontal guide mechanism, the cam plate moves back and forth in the horizontal direction to drive the connecting rod to move back and forth along the cam groove, and then the movable mold frame is driven to move back and forth intermittently in the vertical direction; therefore, accurate control over multi-station intermittent displacement of the movable mold frame in the vertical direction is achieved, and then the multi-station action requirement of a new contact forming process is met.

Description

technical field [0001] The invention relates to the field of cold heading forming equipment or heading machine equipment, in particular to a multi-station displacement driving mechanism of a cold heading motorized formwork frame. Background technique [0002] The processing of double composite contacts used in existing relays is usually realized by a general cold heading machine. The driving mechanism of the movable die frame of the existing general cold heading machine is as follows: figure 1 As shown, the action process is: the driving cam 101 rotates around the fulcrum O' under the action of other transmission mechanisms, and when the driving cam 101 enters the large diameter part from the small diameter part of its cam profile, the driving cam 101 pushes the forward roller block 105 and compress the lower displacement error absorbing spring 106 so that the guide rod 102 bears against the guide block 107 of the swing rod guide block 107 along the guiding direction of the...

AI Technical Summary

Problems solved by technology

When the drive cam 101 rotates to the small-diameter portion of the cam profile, the guide rod 102 will continue to shrink back. At this time, the connecting rod 110 and the swing rod 109 will keep their positions unchanged under the action of the upward movement limit bolt 202, and the upper displacement error Absorption spring 108 is compressed, and the moving mold group of equipment enters the static state of two molding stations (as Figure 2-2 As shown), at this time, the guide groove 113 of the main slider and the guide part of the movable mold frame 20, the guide part of the main slider 112 and the bed guide mechanism 114, due to the upper displacement error absorption spring 108 is applied to the upper limit by the mechanism. The pressure on the positioning bolt 202 and the movable mold frame 20 makes the guide mechanism receive lateral force, which will affect the forming accuracy, and also easily cause premature wear, which will affect the stability of the contact forming

[0004] The existing general-purpose cold heading motorized mold base drive mechanism can only realize the precise limit static state of the upper and lower stations to meet the action requirements of contact cold heading forming, and cannot realize the multi-tasking of three stations and above of the movable mold base The action requirements of the new forming process for intermittently moving contacts, as the double composite contacts used in relays have higher and higher requirements for the distribution of silver layers, the traditional two-station upsetting process has been difficult to meet these contacts upsetting requirements, so it is necessary to develop a multi-station contact continuous upsetting equipment

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