Laravel-excel: Hapus Kutipan dari csv

Hai semuanya, saya mendapatkan file CSV yang diekspor, tetapi setiap data sel memiliki tanda kutip.. Bisakah Anda membantu saya menghapus tanda kutip saat mengekspor ke CSV? di sini sebuah contoh:
"20150521", "62549", "2492","", "16.52", "1,98", "0", "0", "0","", "922330816001","","","P ","","2492"
"20150521", "71343", "2493","", "8,26", "0,99", "0", "0", "0","", "922330816001","","","P ","","2493"
Saya ingin ini..
20150521.62549.2492,,16.52.1.98,0,0,0,,922330816001,,,P,,2492
20150521,71343,2493,,8.26,0.99,0,0,0,,922330816001,,,P,,2493
Terima kasih

ini kode saya:

//generating .csv
$csv = Excel::create($conciliacion->nombre, function($excel){
            $excel->sheet('Lista', function($sheet) {
                $empresa = Empresa::find(1);
                $conciliacion = Session::get('conciliacion');
                Session::forget('conciliacion');
                $fecha_conciliacion = $conciliacion->fecha;

                $i = 1;
                $ordenes = Orden::whereBetween('fecha_emision', array($fecha_conciliacion.' 00:00', $fecha_conciliacion.' 23:59'))->get();
                var_dump($ordenes);
                foreach($ordenes as $o){
                    $sheet->row($i, array(
                        (int)date("Ymd", strtotime($o->fecha_emision)),
                        (int)date("His", strtotime($o->fecha_emision)),
                        (int)$o->numero_orden,
                        (int)$o->tipo_tarjeta,
                        (float)number_format(($o->subtotal_12+$o->subtotal_0), 2),
                        (float)number_format($o->iva, 2),
                        (float)'0.00',
                        (float)number_format($o->intereses/100, 2),
                        (float)number_format($o->total_intereses/100, 2),
                        (int)$o->numero_autorizacion,
                        (int)$empresa->ruc,
                        (int)$o->tipo_credito,
                        (int)$o->meses_credito,
                        'P',
                        '',
                        (int)$o->numero_orden,
                    ));
                    $i++;
                }
            });
        })->export('csv');