CN103722416A

CN103722416A - Method for boring phi-25 pin holes on engine oil pan

Info

Publication number: CN103722416A
Application number: CN201310725190.9A
Authority: CN
Inventors: 关俊杰; 张占革; 陈旭升
Original assignee: LIAOYANG FUXIANG CRANKSHAFT Co Ltd
Current assignee: LIAOYANG FUXIANG CRANKSHAFT Co Ltd
Priority date: 2013-12-25
Filing date: 2013-12-25
Publication date: 2014-04-16

Abstract

The invention relates to a method for boring phi-25 pin holes on an engine oil pan, mainly solving the problem that position precision of the phi-25 pin holes cannot be guaranteed since the phi-25 pin holes are machined by taking phi-9.5 auxiliary holes on an engine oil pan workpiece as positioning holes at present. The method includes, before boring the phi-25 pin holes by a phi-25 pin hole boring tool, machining phi-9.921 holes instead of the phi-9.5 auxiliary holes on the engine oil pan workpiece and then taking the phi-9.921 holes as the positioning holes for boring the phi-25 pin holes, and finally beginning to machine the phi-25 pin holes after finishing positioning. Since the conventional phi-9.5 pin holes on the engine oil pan workpiece are changed into the phi-9.921 holes to serve as the positioning holes for the phi-25 pin holes, the positioning precision of the phi-25 pin holes bored on the engine oil pan is high, and the percent of pass can reach 100%.

Description

The method of boring Φ 25 pin-and-holes on engine sump tank

Technical field:

The present invention relates to a kind of on engine sump tank the method for boring Φ 25 pin-and-holes.

Background technology:

At present, on engine sump tank, boring Φ 25 pin-and-holes are all with Φ 9.5 fabrication holes on workpiece engine sump tank, to make locating hole to process Φ 25 pin-and-holes, and shortcoming is the positional precision that does not often guarantee Φ 25 pin-and-holes, and passing rate of processing is the highest can only reach 60-70%.

Summary of the invention:

It is high that technical problem to be solved by this invention is to provide a kind of positioning precision, the method for boring Φ 25 pin-and-holes on engine sump tank that product percent of pass is high.

Above-mentioned purpose was achieved in that before utilizing boring Φ 25 pin-and-hole frock boring Φ 25 pin-and-holes, 9.5 fabrication holes of the Φ on workpiece engine sump tank is processed into the hole of Φ 9.921, then uses Φ 9.921 holes as the locating hole of boring Φ 25 pin-and-holes.

Specific practice is: the base plate of boring Φ 25 pin-and-hole frocks on engine sump tank is fixed on workbench, positioning sleeve is installed on base plate, alignment pin is fixed on workpiece engine sump tank, then alignment pin and engine sump tank are fixed on base plate, alignment pin inserts in positioning sleeve, side fixed head is fixed on workbench, carrying bolt is connected with side fixed head by nut, support set is enclosed within on carrying bolt, the two ends of pressing plate are enclosed within respectively on the carrying bolt on both sides, there is hold-down bolt at the middle part of pressing plate, clamping cap is contained in the lower end of hold-down bolt by bolt and is pressed on workpiece engine sump tank, nut on rotary support bolt, workpiece engine sump tank is clamped, it is characterized in that: workpiece engine sump tank is being put into base plate, the hole of before upper, 9.5 pin-and-holes of Φ on engine sump tank being processed into Φ 9.921, after nut clamps workpiece engine sump tank, with regard to the locating hole as boring Φ 25 pin-and-holes positions with Φ 9.921 holes, after having located, Φ 25 pin-and-holes just can have been processed.

Advantage of the present invention is: due to Φ 9.5 pin-and-holes that are used for locating Φ 25 pin-and-holes on workpiece engine sump tank are processed into Φ 9.921 holes as locating hole, so the positioning precision of boring Φ 25 pin-and-holes is high on engine sump tank, product percent of pass can reach 100%.

Accompanying drawing explanation:

Fig. 1 be the present invention on engine sump tank during boring Φ 25 pin-and-hole engine sump tank be fixed on the main TV structure schematic diagram in frock;

Fig. 2 be the present invention on engine sump tank during boring Φ 25 pin-and-hole engine sump tank be fixed on the left TV structure schematic diagram in frock;

Fig. 3 be the present invention on engine sump tank during boring Φ 25 pin-and-hole engine sump tank be fixed on the plan structure schematic diagram in frock.

The specific embodiment:

Before utilizing boring Φ 25 pin-and-hole frock boring Φ 25 pin-and-holes, 9.5 fabrication holes of the Φ on workpiece engine sump tank are processed into the hole of Φ 9.921, then use Φ 9.921 holes as the locating hole of boring Φ 25 pin-and-holes;

Specific practice is: with reference to Fig. 1-3, the base plate 1 of boring Φ 25 pin-and-hole frocks on engine sump tank is fixed on workbench 11, positioning sleeve 8 is installed on base plate 1, alignment pin 9 is fixed on workpiece engine sump tank 10, then alignment pin and engine sump tank are fixed on base plate 1, alignment pin 9 inserts in positioning sleeve 8, side fixed head 2 is fixed on workbench 11, carrying bolt 4 is connected with side fixed head 2 by nut, support set 3 is enclosed within on carrying bolt 4, the two ends of pressing plate 5 are enclosed within respectively on the carrying bolt 4 on both sides, there is hold-down bolt 7 at the middle part of pressing plate 5, clamping cap 6 is contained in the lower end of hold-down bolt 7 by bolt 13 and is pressed on workpiece engine sump tank, nut 12 on rotary support bolt 4, workpiece engine sump tank is clamped, it is characterized in that: the hole of before workpiece engine sump tank is put on base plate 1,9.5 pin-and-holes of the Φ on engine sump tank being processed into Φ 9.921, after nut 12 clamps workpiece engine sump tank, with regard to the locating hole as boring Φ 25 pin-and-holes positions with Φ 9.921 holes, after having located, Φ 25 pin-and-holes just can have been processed.

Claims

1. the method for boring Φ 25 pin-and-holes on engine sump tank, the base plate (1) of boring Φ 25 pin-and-hole frocks on engine sump tank is fixed on workbench (11), at the upper positioning sleeve (8) of installing of base plate (1), alignment pin (9) is fixed on workpiece engine sump tank (10), then alignment pin and engine sump tank are fixed on base plate (1), alignment pin (9) inserts in positioning sleeve (8), side fixed head (2) is fixed on workbench (11), carrying bolt (4) is connected with side fixed head (2) by nut, support set (3) is enclosed within on carrying bolt (4), the two ends of pressing plate (5) are enclosed within respectively on the carrying bolt (4) on both sides, there is hold-down bolt (7) at the middle part of pressing plate (5), clamping cap (6) is contained in the lower end of hold-down bolt (7) and is pressed on workpiece engine sump tank by bolt (13), nut (12) on rotary support bolt (4), workpiece engine sump tank is clamped, it is characterized in that: workpiece engine sump tank is being put into the upper hole of before 9.5 pin-and-holes of the Φ on engine sump tank being processed into Φ 9.921 of base plate (1), after nut (12) clamps workpiece engine sump tank, with regard to the locating hole as boring Φ 25 pin-and-holes positions with Φ 9.921 holes, after having located, Φ 25 pin-and-holes just can have been processed.