CN102398057A

CN102398057A - Processing method of a creeper tread

Info

Publication number: CN102398057A
Application number: CN201110326164XA
Authority: CN
Inventors: 姜希尚; 姜玉飞
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-10-25
Filing date: 2011-10-25
Publication date: 2012-04-04
Anticipated expiration: 2031-10-25
Also published as: CN102398057B

Abstract

A processing method of a creeper tread comprises following processing steps: assemble alloy cutter bit within the cutter grooves of two boring bars, use knife aligning plate to align the cutter bit to the set size, lay it on the special fixture of the lathe, use four lifting jack to regulate the distance between the boring bar cutter bit and the creeper tread axle hole, clamp the creeper tread, finish processing the first row holes, unload machine head fixture, centre rest, and tailstock centre, then locate the second boring bar on the lathe, cut the second raw holes. The technology ensures the axiality <=0.5 mm, double row's axial holes' parallelism depth <=0.5 mm. Because of the design of knife aligning plate, the knife alignment is quick which solves the problem of being unable to regulate the distance between the boring bar cutter bit and the axial holes caused by small space at the casting piece processing area. The quality of the creeper tread is greatly improved, and the production cost is lowered.

Description

The processing method of creeper tread

Technical field

The present invention relates to the processing method of creeper tread, specifically is the processing method of crawler crane, crane creeper tread.

Background technology

Creeper tread is one of crawler crane (hanging) key components and parts; Can its comprehensive mechanical property and pin shaft hole relative dimensions (like the axiality in aperture, hole, the depth of parallelism of both sides axis hole etc.) guarantee to scheme paper size and up to standard, are the key factors that directly influences creeper tread service life and the disconnected plate rate of reduction.

Produce for a long time the material of creeper tread most of adopt potassium steel (compact board) and in, low-alloy steel makes; Though and this two steel grade comprehensive mechanical property wearability, cost performance etc. take advantage than other steel grades, the manufacturability of its casting particularly on the manufacturability of machining difficulty bigger.

In order to reach the drawing dimensional requirement, have to spend a large amount of man-hours and accomplish this procedure, but often do not reach the dimensional tolerance of drawing requirement at the milling tools of axis hole and regardless of expense.

The creeper tread that tonnage is big, size is long, the casting distortion is big, it is particularly outstanding that this contradiction seems.What according to investigations, domestic production tonnage manufacturer big, the long creeper tread of size can be up to standard on the pin shaft hole dimensional tolerance at present is few in number.

Summary of the invention

The object of the invention provides and a kind ofly can increase substantially service life, the production efficiency of creeper tread and reduce production costs and reach the processing method and the equipment of the creeper tread of drawing dimensional requirement comprehensively.

The technical scheme that adopts:

The processing method of creeper tread comprises following processing step:

1. according to the quantity of need processing axis hole, the alloy cutter head that 10 * 10 ㎜ mill is good is assembled in the cutter groove of two boring bars;

2. use knife plate cutter head in the size of regulation, and tighten jackscrew cutter head card jail;

3. assembling is mixed up two boring bars of cutter head distance, be respectively charged in the axis hole of having cleared up creeper tread to be processed;

4. sling and assembled the creeper tread of boring bar, be placed on the special mould clamp of lathe;

5. through head of a bed jig, centre frame, platform tail centre, the fixedly concentric position of boring bar (3 in alignment);

6. four jack installing on the rotation jig, the distance between adjustment boring bar cutter head and creeper tread axis hole is to guarantee the uniformity and the axiality of processing axis hole;

7. the chucking creeper tread starts lathe, makes each axis hole feed simultaneously cutting and since porous cut simultaneously stressed evenly, thereby guaranteed the size and the axiality of circular hole;

8. cut finish (first round) and dismantle head of a bed jig, centre frame, platform tail centre, vertically move the knife rest that jig is housed, second boring bar is positioned on the straight line of the head of a bed, centre frame, platform tail centre;

9. start lathe processing method boring second row's axis hole of 7 set by step; Though this moment second, row's creeper tread axis hole was that secondary is processed respectively; Owing to be the particularity with boring bars of once being installed; Not only guarantee the requirement of axiality≤0.5 ㎜, the more important thing is the extremely harsh requirement that has guaranteed the double axis hole depth of parallelism≤0.5 ㎜;

10. the cutting of second round finishes, and unclamps clamping bolt, platform tail centre, head of a bed jig, creeper tread is unloaded together with two groups of boring bars winch to dimensional gaughing place;

11. check axiality, the depth of parallelism in double hole with drift, with the lower limit of each axis hole of no-go gage inspection;

So far whole qualified creeper treads are changed down over to preface.

After unloading first creeper tread, at once with adjusted, assembled second creeper tread of boring bar, hang on jig by above-mentioned technological process and process, guaranteed that so promptly the work continuity has improved operating efficiency again.

The invention has the advantages that:

1, with the distance between n cutter head and need processing circular hole, the adjustment processing dimension has solved foundry goods and can't adopt machining, a long-term unsolved difficult problem because of no positioning reference plane;

2, adopt three-point fix, guaranteed axiality≤0.5mm;

3, foundry goods once is installed, and has guaranteed the harsh requirement of the depth of parallelism≤0.5mm of the double pin shaft holes in both sides;

4, employing is not cut by the multistation machine swaging clamp head of pin shaft hole restricted number, the feed simultaneously of a plurality of pin shaft hole, and is stressed even, solved the unmanageable problem of wear-resisting high-strength steel alloy, guaranteed the aperture size tolerance;

5, take to process bilateral pin shaft hole boring bar with the scheme that foundry goods once is installed, solved and processed the difficult problem that second row's pin shaft hole does not unload foundry goods, do not adorn boring bar;

6, designed knife plate, tool setting fast, solved because of the very little difficult problem that can't adjust distance between boring bar cutter head and axis hole that causes in casting structure processing place space.

Description of drawings

Fig. 1 is a creeper tread machining state sketch map.

Fig. 2 is the side view of Fig. 1.

Fig. 3 is the A place enlarged diagram of Fig. 2.

Fig. 4 is the drift structural representation.

Fig. 5 ends the drift structural representation.

Fig. 6 is a tool setting plate structure sketch map.R1 is the boring bar size among the figure, and R2 is the cutter tip size, and R3 is to the knife plate excircle dimension.

Fig. 7 is to the knife plate right view.

The specific embodiment

The processing method of creeper tread comprises following processing step:

1, processes the quantity of axis hole according to need; With the good alloy cutter head 6 of a plurality of 10 * 10mm mills; Be assembled in respectively in the cutter groove 7 corresponding on two boring bars 5 of boring machine 1, use knife plate 11 a plurality of alloy cutter heads 6 respectively in the size of regulation, and tighten corresponding jackscrew 8 respectively cutter head card jail;

2, assembling is mixed up two boring bars 5 of alloy cutter head 6 distances, be respectively charged in the corresponding axis hole of creeper tread to be processed 4;

3, on the head of a bed jig 3 that sling the creeper tread 4 of having assembled boring bar, is placed in lathe, set up the concentric position of boring bar 5 through the platform tail centre of head of a bed jig 3, centre frame 2 and lathe.

4, rotate four jack installing on the head of a bed jig 3, adjustment boring bar 5 and the distance of a plurality of alloy cutter heads 6 with creeper tread 4 axis holes;

5, chucking creeper tread 4 starts lathe, makes each axis hole feed simultaneously cutting; Dismantle head of a bed jig, centre frame, platform tail centre after having cut first round, vertically move the knife rest that jig is housed, second boring bar 5 is positioned on the straight line of the head of a bed, centre frame and platform tail centre;

6, start lathe and process second row's axis hole as stated above, process second row and unclamp clamping bolt behind the axis hole, platform tail centre, head of a bed jig unload creeper tread together with two boring bars, deliver to dimensional gaughing place;

7, check the axiality in double hole with drift 9, the depth of parallelism, the lower limit with no-go gage 10 each axis hole of inspection promptly gets.

Claims

1. the processing method of creeper tread is characterized in that: comprise following processing step:

(1), according to the quantity of need processing axis hole, with the good alloy cutter head of 10 * 10 ㎜ mill, be assembled in the cutter groove of two boring bars;

(2), use knife plate cutter head in the size of regulation, and tighten jackscrew with cutter head card jail;

(3), assembling is mixed up two boring bars of cutter head distance, be respectively charged in the axis hole of having cleared up creeper tread to be processed;

(4), sling and assembled the creeper tread of boring bar, be placed on the special mould clamp of lathe;

(5), through head of a bed jig, centre frame, platform tail centre, the fixedly concentric position of boring bar;

(6), rotate four jack installing on the jig, the distance between adjustment boring bar cutter head and creeper tread axis hole, the uniformity and the axiality of processing axis hole with assurance;

(7), the chucking creeper tread, start lathe, make each axis hole feed simultaneously cutting since porous cut simultaneously stressed evenly, thereby guaranteed the size and the axiality of circular hole;

Dismantle head of a bed jig, platform tail centre after having cut first row's axis hole, vertically move the knife rest that jig is housed, second boring bar is positioned on the straight line of the head of a bed, centre frame, platform tail centre;

Start lathe processing method cutting processing completion second row's axis hole of 7 set by step, axiality≤0.5 ㎜, the double axis hole depth of parallelism≤0.5 ㎜;

The cutting of second round finishes, and unclamps clamping bolt, platform tail centre, head of a bed jig, creeper tread is unloaded together with two groups of boring bars winch to dimensional gaughing place;

Check axiality, the depth of parallelism in double hole with drift, with the lower limit of each axis hole of no-go gage inspection;

So far whole qualified creeper treads are changed down over to preface.