US 9,759,253 B2Granted

Method for cracking a connecting rod

AssigneeGaindu, S.L.

InventorsGorka Prieto, Javier Pena

Life of this patent

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Abstract

The machine for cracking a connecting rod comprises an electro press with an electric motor (400) for actuating an expandable element. The electro press comprises a first S actuator part (410) and a second actuator part (430) arranged so that when the first actuator part is driven by the electric motor (400) from a first position to a second position, (a) the first actuator part (410) is first driven by the electric motor (400) from said first position (FIG. 12A) to an intermediate position (FIG. 12B), without displacing the second actuator part (430), and (b) subsequently the first actuator part (410) is further driven by the electric motor (400) from said intermediate position (FIG. 12B) to said second position (FIG. 12C), displacing the second actuator part from a non-expanding position to an expanding position.

Claims20

Dependent claims

Method of cracking a connecting rod having a small end and a big end, into a rod part (1001) and a cap part (1002), using a machine comprising:

positioning elements for positioning said connecting rod in a position for cracking;
an expandable element (3) arranged to be inserted into a bore in said big end of the connecting rod so as to allow for splitting of said connecting rod (1000) into said rod part (1001) and said cap part (1002) by expanding said expandable element;
and
an electro press (4) comprising an electric motor (400) for actuating the expandable element by means of displacing an actuator (410, 430) to expand said expandable element;
the method comprising the steps of:
operating the electric motor (400) to first accelerate said actuator (410, 430) until it reaches a predetermined velocity before expansion of said expandable element (3), and
thereafter maintaining said actuator moving substantially at said predetermined velocity during expansion of said expandable element (3) until the connecting rod has been cracked into said rod part and said cap part.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/192,709Filed 24 Jun 2016 · division
Priority: EP 1338219224 May 2013
Published: US 2016/0305472 A120 Oct 2016
Granted: 12 Sep 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

F16C 9/045
Connecting-rod bearings; Attachments thereof: the bearing cap of the connecting rod being split by fracturing
B23D 31/002
Shearing machines or shearing devices covered by none or more than one of the groups B23D15/00 - B23D29/00; Combinations of shearing machines:…
B23D 31/003
Breaking machines, i.e. pre-cutting and subsequent breaking: for rings
Y10T 29/49218
By assembling plural parts: with deforming

Family

Application14/283,011Parent of this division · filed 20 May 2014
US 2016/0305472 A1Pre-grant publication · published 20 Oct 2016
US 9,403,223 B2Parent of this division
US 2014/0345133 A1Published application
US 9,759,253 B2This patent

From the US filing history. Foreign family members aren’t listed.