CN103143896A - Forming technology of lower frame of excavator - Google Patents

Abstract

The invention discloses a forming technology of a lower frame of an excavator. The forming technology comprises the steps that: 1, a middle rack and track racks are machined and formed respectively, race locating holes are circumferentially and symmetrically formed in a middle disc of the middle rack, 2, the middle rack is suspended onto a locating plate at the center top end of an overlap welding mold, and located by the race locating holes of the middle rack, upright locating holes are formed at vertex angles of the locating plate respectively, the locating plate is fastened with the overlap welding mold by locating uprights, and 3, the two track racks are suspended on the two sides of the middle rack and forms a whole with the middle rack through overlap welding after location. According to the technology, the middle rack and the track racks are welded integrally after being machined respectively, the workpiece deformation is low, the manufacturing is simple and easy, the working procedures can be split to be conducted on a general-purpose machine tool, the equipment rate is reduced greatly, the cost is saved, the machining efficiency is improved, metal machining is not a bottleneck working procedure any longer, and the whole manufacturing procedure is very smooth.

Description

A kind of moulding process of lower frame of excavator

Technical field

The present invention relates to a kind of moulding process of engineering mechanical components, be specifically related to a kind of moulding process of lower frame of excavator.

Background technology

At present, in prior art, the moulding process of lower frame of excavator is: with middle frame and the first integral solder of track frame, then work in-process is processed in the heart.The shortcoming of this technique is: product centering time on frock is longer, and working (machining) efficiency is low, and having caused machining processes is bottleneck in the integral manufacturing operation, and the rate of machining center is high, thereby cost is high.

Summary of the invention

The object of the invention is to overcome above-mentioned the deficiencies in the prior art, a kind of moulding process of lower frame of excavator of simple to operate, low cost of manufacture is provided.

The moulding process of a kind of lower frame of excavator provided by the invention, step is:

Step 1, respectively with middle frame and track frame machine-shaping, the disk place offers the seat ring locating hole along the circumference symmetry at middle frame middle part;

Step 2, middle frame is hung to the location-plate on top, joint welding mould center, and position with the seat ring locating hole of middle frame, the drift angle place of location-plate offers respectively station post locating hole, and is fastening by localizer station post and joint welding mould;

Step 3, two track frames are hung respectively both sides to middle frame, becomes integral body behind the location with the middle frame joint welding.

The present invention processes respectively rear integral solder with middle frame and track frame, the workpiece deformation amount is little, make simple, easy row, operation is detachable processes being arranged on machine tool, the rate of equipment reduces greatly, has saved cost, and working (machining) efficiency increases, make metalworking no longer become the bottleneck operation, the integral manufacturing operation is greatly smooth and easy.

Description of drawings

Fig. 1 is the middle frame structural representation in the present invention.

Fig. 2 is main TV structure schematic diagram of the present invention.

Fig. 3 is the side-looking structural representation in the present invention.

Fig. 4 is the plan structure schematic diagram in the present invention.

The specific embodiment

Below in conjunction with specific embodiment, the present invention will be further described.Should be understood that following examples are only for explanation the present invention but not for limiting the scope of the invention.

Embodiment 1

In conjunction with Fig. 1 to Fig. 4

The moulding process of a kind of lower frame of excavator provided by the invention, step is:

Step 1, respectively with middle frame 1 and track frame 2 machine-shapings, 1 disk place, middle part offers six seat ring locating holes 3 along the circumference symmetry at middle frame;

Step 2, middle frame 1 is hung to the location-plate 5 on joint welding mould 4 tops, center, and with six seat ring locating holes, 3 location after middle frame 1 processing, adopt alignment pin and location-plate 5 to be connected and installed; Four drift angle places of location-plate 5 offer station post locating hole 6, and are fastening by four localizer station posts 7 and joint welding mould 4, guarantee that the middle frame accurate positioning is reliable;

Step 3, two track frames 7 are hung in respectively the both sides of middle frame 1, take track frame 7 termination end faces and side as benchmark, after the measurement relative dimensions, adopt the locating rack 8 and the fastening frame 9 that are arranged on joint welding mould 4 sides to realize that the location is fixing, become whole with middle frame 1 joint welding after fixing.

Claims (1)

1. the moulding process of a lower frame of excavator is characterized in that:

Step is:

Step 1, respectively with middle frame and track frame machine-shaping, the disk place offers the seat ring locating hole along the circumference symmetry at middle frame middle part;

Step 2, middle frame is hung to the location-plate on top, joint welding mould center, and position with the seat ring locating hole of middle frame, the drift angle place of location-plate offers respectively station post locating hole, and is fastening by localizer station post and joint welding mould;

Step 3, two track frames are hung respectively both sides to middle frame, becomes integral body behind the location with the middle frame joint welding.

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