Bài 26. MỐI GHÉP THÁO ĐƯỢC
<h3 style="text-align: justify;" id="1-moi-gheacutep-bang-ren">1. Mối ghép bằng ren</h3> <h4 style="text-align: justify;">a) Cấu tạo mối ghép</h4> <p style="text-align: justify;">Mối ghép bằng ren gồm có ba loại chính (h.26.1):</p> <p style="text-align: justify;">- Mối ghép bu lông.</p> <p style="text-align: justify;">- Mối ghép vít cấy.</p> <p style="text-align: justify;">- Mối ghép đinh vít.</p> <p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/b26a-1672417813.PNG.webp" alt="hinh-anh-bai-26-moi-ghep-thao-duoc-2674-0" title="hinh-anh-bai-26-moi-ghep-thao-duoc-2674-0" loading="lazy"></p><div> <div class="ads-horizontal-wrapped" style="height: auto !important; min-height: 0px !important;">
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</div><p></p> <p style="text-align: justify;"><em>Quan sát hình 26.1 và hoàn thành các câu sau:</em></p> <p style="text-align: justify;">Mối ghép bu lông gồm: .........................................<span style="white-space: pre;"> </span></p> <p style="text-align: justify;">Mối ghép vít cấy gồm: .........................................&nbsp;</p><div class="google-auto-placed ap_container" style="width: 100%; height: auto; clear: both; text-align: center;"><ins data-ad-format="auto" class="adsbygoogle adsbygoogle-noablate" data-ad-client="ca-pub-8123786206223951" data-adsbygoogle-status="done" style="display: block; margin: auto; background-color: transparent; height: 0px;" data-ad-status="unfilled"><div id="aswift_4_host" tabindex="0" title="Advertisement" aria-label="Advertisement" style="border: none; height: 0px; width: 741px; margin: 0px; padding: 0px; position: relative; visibility: visible; background-color: transparent; display: inline-block; overflow: visible; opacity: 1;"><iframe id="aswift_4" name="aswift_4" style="left: 0px; position: absolute; top: 0px; border: 0px; width: 741px; height: 0px;" sandbox="allow-forms allow-popups allow-popups-to-escape-sandbox allow-same-origin allow-scripts allow-top-navigation-by-user-activation" width="741" height="0" frameborder="0" marginwidth="0" marginheight="0" vspace="0" hspace="0" allowtransparency="true" scrolling="no" src="https://googleads.g.doubleclick.net/pagead/ads?client=ca-pub-8123786206223951&amp;output=html&amp;h=280&amp;adk=2020488560&amp;adf=4280474192&amp;pi=t.aa~a.1694800419~i.21~rp.4&amp;w=741&amp;fwrn=4&amp;fwrnh=100&amp;lmt=1690916938&amp;num_ads=1&amp;rafmt=1&amp;armr=3&amp;sem=mc&amp;pwprc=7302649500&amp;ad_type=text_image&amp;format=741x280&amp;url=https%3A%2F%2Fsachgiaokhoa.online%2Fbai-26-moi-ghep-thao-duoc-2674G2942.html&amp;fwr=0&amp;pra=3&amp;rh=186&amp;rw=741&amp;rpe=1&amp;resp_fmts=3&amp;wgl=1&amp;fa=27&amp;uach=WyJtYWNPUyIsIjEzLjAuMCIsIng4NiIsIiIsIjExNS4wLjU3OTAuMTE0IixbXSwwLG51bGwsIjY0IixbWyJOb3QvQSlCcmFuZCIsIjk5LjAuMC4wIl0sWyJHb29nbGUgQ2hyb21lIiwiMTE1LjAuNTc5MC4xMTQiXSxbIkNocm9taXVtIiwiMTE1LjAuNTc5MC4xMTQiXV0sMF0.&amp;dt=1690916938955&amp;bpp=1&amp;bdt=1136&amp;idt=-M&amp;shv=r20230727&amp;mjsv=m202307270401&amp;ptt=9&amp;saldr=aa&amp;abxe=1&amp;cookie=ID%3D94547395a8fa18af-22e89ad22ae300c0%3AT%3D1690912062%3ART%3D1690916932%3AS%3DALNI_MYNbCG599XmevrUPCYJ3Zv-Np5EvA&amp;gpic=UID%3D00000d3b2ce8a729%3AT%3D1690912062%3ART%3D1690916932%3AS%3DALNI_MaVlHrwAJeI0KGbMoTcFZDk5BwO2Q&amp;prev_fmts=0x0%2C741x280%2C1122x280&amp;nras=3&amp;correlator=7986640447945&amp;frm=20&amp;pv=1&amp;ga_vid=314055585.1690916938&amp;ga_sid=1690916938&amp;ga_hid=949007896&amp;ga_fc=0&amp;u_tz=420&amp;u_his=50&amp;u_h=1080&amp;u_w=1920&amp;u_ah=1055&amp;u_aw=1920&amp;u_cd=24&amp;u_sd=1&amp;dmc=8&amp;adx=394&amp;ady=1596&amp;biw=1910&amp;bih=970&amp;scr_x=0&amp;scr_y=0&amp;eid=44759876%2C44759927%2C44759842%2C31076088%2C31076484%2C31076578%2C44788442&amp;oid=2&amp;pvsid=2165090342133286&amp;tmod=133538902&amp;uas=0&amp;nvt=1&amp;fc=1408&amp;brdim=0%2C25%2C0%2C25%2C1920%2C25%2C1920%2C1055%2C1920%2C970&amp;vis=1&amp;rsz=%7C%7Cs%7C&amp;abl=NS&amp;fu=128&amp;bc=31&amp;ifi=5&amp;uci=a!5&amp;btvi=2&amp;fsb=1&amp;xpc=8I3ZvlumOR&amp;p=https%3A//sachgiaokhoa.online&amp;dtd=12" data-google-container-id="a!5" data-google-query-id="CKjug7yUvIADFVdOwgUd5XQLxA" data-load-complete="true"></iframe></div></ins></div> <p style="text-align: justify;">Mối ghép đinh vít gồm: .........................................&nbsp;</p><div class="google-auto-placed ap_container" style="width: 100%; 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Khi ghép, bu lông được luồn qua lỗ của chi tiết 3, 4 rồi siết chặt bằng đai ốc. Vòng đệm 2 có tác dụng phân bố đều lực siết và tránh làm hỏng bề mặt của chi tiết.</p> <p style="text-align: justify;">- Trong mối ghép vít cấy (h.26.1b), một đầu của vít cấy có ren được cấy vào lỗ ren của chi tiết 4, chi tiết 3 có lỗ trơn, lồng qua đầu kia của vít, sau đó lồng vòng đệm vào vít cấy và siết chặt đai ốc.</p><div class="google-auto-placed ap_container" style="width: 100%; height: auto; clear: both; text-align: center;"><ins data-ad-format="auto" class="adsbygoogle adsbygoogle-noablate" data-ad-client="ca-pub-8123786206223951" data-adsbygoogle-status="done" style="display: block; margin: auto; background-color: transparent; height: 0px;"><div id="aswift_6_host" tabindex="0" title="Advertisement" aria-label="Advertisement" style="border: none; height: 0px; width: 741px; margin: 0px; padding: 0px; position: relative; visibility: visible; background-color: transparent; display: inline-block; overflow: visible; opacity: 1;"><iframe id="aswift_6" name="aswift_6" style="left: 0px; position: absolute; top: 0px; border: 0px; width: 741px; height: 0px;" sandbox="allow-forms allow-popups allow-popups-to-escape-sandbox allow-same-origin allow-scripts allow-top-navigation-by-user-activation" width="741" height="0" frameborder="0" marginwidth="0" marginheight="0" vspace="0" hspace="0" allowtransparency="true" scrolling="no" src="https://googleads.g.doubleclick.net/pagead/ads?client=ca-pub-8123786206223951&amp;output=html&amp;h=280&amp;adk=2020488560&amp;adf=317011298&amp;pi=t.aa~a.1694800419~i.29~rp.4&amp;w=741&amp;fwrn=4&amp;fwrnh=100&amp;lmt=1690916938&amp;num_ads=1&amp;rafmt=1&amp;armr=3&amp;sem=mc&amp;pwprc=7302649500&amp;ad_type=text_image&amp;format=741x280&amp;url=https%3A%2F%2Fsachgiaokhoa.online%2Fbai-26-moi-ghep-thao-duoc-2674G2942.html&amp;fwr=0&amp;pra=3&amp;rh=186&amp;rw=741&amp;rpe=1&amp;resp_fmts=3&amp;wgl=1&amp;fa=27&amp;uach=WyJtYWNPUyIsIjEzLjAuMCIsIng4NiIsIiIsIjExNS4wLjU3OTAuMTE0IixbXSwwLG51bGwsIjY0IixbWyJOb3QvQSlCcmFuZCIsIjk5LjAuMC4wIl0sWyJHb29nbGUgQ2hyb21lIiwiMTE1LjAuNTc5MC4xMTQiXSxbIkNocm9taXVtIiwiMTE1LjAuNTc5MC4xMTQiXV0sMF0.&amp;dt=1690916938955&amp;bpp=1&amp;bdt=1136&amp;idt=-M&amp;shv=r20230727&amp;mjsv=m202307270401&amp;ptt=9&amp;saldr=aa&amp;abxe=1&amp;cookie=ID%3D94547395a8fa18af-22e89ad22ae300c0%3AT%3D1690912062%3ART%3D1690916932%3AS%3DALNI_MYNbCG599XmevrUPCYJ3Zv-Np5EvA&amp;gpic=UID%3D00000d3b2ce8a729%3AT%3D1690912062%3ART%3D1690916932%3AS%3DALNI_MaVlHrwAJeI0KGbMoTcFZDk5BwO2Q&amp;prev_fmts=0x0%2C741x280%2C1122x280%2C741x280%2C741x280&amp;nras=5&amp;correlator=7986640447945&amp;frm=20&amp;pv=1&amp;ga_vid=314055585.1690916938&amp;ga_sid=1690916938&amp;ga_hid=949007896&amp;ga_fc=0&amp;u_tz=420&amp;u_his=50&amp;u_h=1080&amp;u_w=1920&amp;u_ah=1055&amp;u_aw=1920&amp;u_cd=24&amp;u_sd=1&amp;dmc=8&amp;adx=394&amp;ady=2441&amp;biw=1910&amp;bih=970&amp;scr_x=0&amp;scr_y=0&amp;eid=44759876%2C44759927%2C44759842%2C31076088%2C31076484%2C31076578%2C44788442&amp;oid=2&amp;pvsid=2165090342133286&amp;tmod=133538902&amp;uas=0&amp;nvt=1&amp;fc=1408&amp;brdim=0%2C25%2C0%2C25%2C1920%2C25%2C1920%2C1055%2C1920%2C970&amp;vis=1&amp;rsz=%7C%7Cs%7C&amp;abl=NS&amp;fu=128&amp;bc=31&amp;ifi=7&amp;uci=a!7&amp;btvi=4&amp;fsb=1&amp;xpc=nivFqgHWwP&amp;p=https%3A//sachgiaokhoa.online&amp;dtd=26" data-google-container-id="a!7" data-google-query-id="CNbQhLyUvIADFULivAod-8ADtA" data-load-complete="true"></iframe></div></ins></div> <p style="text-align: justify;">- Trong mối ghép đinh vít (h.26.1c), phần ren của đinh vít lắp vào chi tiết 4 có lỗ ren, đầu kia của đinh vít có xẻ rãnh được ép chặt vào chi tiết bị ghép mà không cần đai ốc.</p> <p style="text-align: justify;">Tuỳ theo mục đích sử dụng mà chúng ta có thể chọn một trong ba kiểu mối ghép ren trên.</p> <h4 style="text-align: justify;">b) Đặc điểm và ứng dụng</h4> <p style="text-align: justify;">- Mối ghép bằng ren có cấu tạo đơn giản, dễ tháo lắp, nên được dùng rộng rãi trong các mối ghép cần tháo lắp.</p> <p style="text-align: justify;">- Mối ghép bu lông thường dùng để ghép các chi tiết có chiều dày không lớn và cần tháo lắp.</p><div class="google-auto-placed ap_container" style="width: 100%; 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height: auto; clear: both; text-align: center;"><ins data-ad-format="auto" class="adsbygoogle adsbygoogle-noablate" data-ad-client="ca-pub-8123786206223951" data-adsbygoogle-status="done" style="display: block; margin: auto; background-color: transparent; height: 0px;"><div id="aswift_8_host" tabindex="0" title="Advertisement" aria-label="Advertisement" style="border: none; height: 0px; width: 741px; margin: 0px; padding: 0px; position: relative; visibility: visible; background-color: transparent; display: inline-block; overflow: visible; opacity: 1;"><iframe id="aswift_8" name="aswift_8" style="left: 0px; position: absolute; top: 0px; border: 0px; width: 741px; height: 0px;" sandbox="allow-forms allow-popups allow-popups-to-escape-sandbox allow-same-origin allow-scripts allow-top-navigation-by-user-activation" width="741" height="0" frameborder="0" marginwidth="0" marginheight="0" vspace="0" hspace="0" allowtransparency="true" scrolling="no" src="https://googleads.g.doubleclick.net/pagead/ads?client=ca-pub-8123786206223951&amp;output=html&amp;h=280&amp;adk=2020488560&amp;adf=3275021287&amp;pi=t.aa~a.1694800419~i.41~rp.4&amp;w=741&amp;fwrn=4&amp;fwrnh=100&amp;lmt=1690916938&amp;num_ads=1&amp;rafmt=1&amp;armr=3&amp;sem=mc&amp;pwprc=7302649500&amp;ad_type=text_image&amp;format=741x280&amp;url=https%3A%2F%2Fsachgiaokhoa.online%2Fbai-26-moi-ghep-thao-duoc-2674G2942.html&amp;fwr=0&amp;pra=3&amp;rh=186&amp;rw=741&amp;rpe=1&amp;resp_fmts=3&amp;wgl=1&amp;fa=27&amp;uach=WyJtYWNPUyIsIjEzLjAuMCIsIng4NiIsIiIsIjExNS4wLjU3OTAuMTE0IixbXSwwLG51bGwsIjY0IixbWyJOb3QvQSlCcmFuZCIsIjk5LjAuMC4wIl0sWyJHb29nbGUgQ2hyb21lIiwiMTE1LjAuNTc5MC4xMTQiXSxbIkNocm9taXVtIiwiMTE1LjAuNTc5MC4xMTQiXV0sMF0.&amp;dt=1690916938955&amp;bpp=1&amp;bdt=1136&amp;idt=2&amp;shv=r20230727&amp;mjsv=m202307270401&amp;ptt=9&amp;saldr=aa&amp;abxe=1&amp;cookie=ID%3D94547395a8fa18af-22e89ad22ae300c0%3AT%3D1690912062%3ART%3D1690916932%3AS%3DALNI_MYNbCG599XmevrUPCYJ3Zv-Np5EvA&amp;gpic=UID%3D00000d3b2ce8a729%3AT%3D1690912062%3ART%3D1690916932%3AS%3DALNI_MaVlHrwAJeI0KGbMoTcFZDk5BwO2Q&amp;prev_fmts=0x0%2C741x280%2C1122x280%2C741x280%2C741x280%2C741x280%2C741x280&amp;nras=7&amp;correlator=7986640447945&amp;frm=20&amp;pv=1&amp;ga_vid=314055585.1690916938&amp;ga_sid=1690916938&amp;ga_hid=949007896&amp;ga_fc=0&amp;u_tz=420&amp;u_his=50&amp;u_h=1080&amp;u_w=1920&amp;u_ah=1055&amp;u_aw=1920&amp;u_cd=24&amp;u_sd=1&amp;dmc=8&amp;adx=394&amp;ady=3316&amp;biw=1910&amp;bih=970&amp;scr_x=0&amp;scr_y=0&amp;eid=44759876%2C44759927%2C44759842%2C31076088%2C31076484%2C31076578%2C44788442&amp;oid=2&amp;pvsid=2165090342133286&amp;tmod=133538902&amp;uas=0&amp;nvt=1&amp;fc=1408&amp;brdim=0%2C25%2C0%2C25%2C1920%2C25%2C1920%2C1055%2C1920%2C970&amp;vis=1&amp;rsz=%7C%7Cs%7C&amp;abl=NS&amp;fu=128&amp;bc=31&amp;ifi=9&amp;uci=a!9&amp;btvi=6&amp;fsb=1&amp;xpc=gszfJ6ihaW&amp;p=https%3A//sachgiaokhoa.online&amp;dtd=38" data-google-container-id="a!9" data-google-query-id="CLrNhryUvIADFS5FwgUdPlYIAg" data-load-complete="true"></iframe></div></ins></div> <p style="text-align: justify;">- Mối ghép đinh vít dùng cho những chi tiết bị ghép chịu lực nhỏ.</p> <p style="text-align: justify;"><em>Hãy kể tên các đồ vật có mối ghép bằng ren mà em thường gặp.</em></p> <h3 style="text-align: justify;" id="2-moi-gheacutep-bang-then-vagrave-chot">2. Mối ghép bằng then và chốt</h3> <h4 style="text-align: justify;">a) Cấu tạo của mối ghép</h4> <p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/b26b-1672418089.PNG.webp" width="836" height="267" alt="hinh-anh-bai-26-moi-ghep-thao-duoc-2674-1" title="hinh-anh-bai-26-moi-ghep-thao-duoc-2674-1" loading="lazy"></p> <p style="text-align: justify;"><em>Quan sát mối ghép bằng then và chốt ở hình 26.2 và hoàn thành các câu sau:</em></p> <p style="text-align: justify;">Mối ghép bằng then gồm: .........................................</p><div class="google-auto-placed ap_container" style="width: 100%; height: auto; clear: both; text-align: center;"><ins data-ad-format="auto" class="adsbygoogle adsbygoogle-noablate" data-ad-client="ca-pub-8123786206223951" data-adsbygoogle-status="done" style="display: block; margin: auto; background-color: transparent; height: 0px;"><div id="aswift_9_host" style="border: none; height: 0px; width: 741px; margin: 0px; padding: 0px; position: relative; visibility: visible; background-color: transparent; display: inline-block; overflow: visible; opacity: 1;" tabindex="0" title="Advertisement" aria-label="Advertisement"><iframe id="aswift_9" name="aswift_9" style="left: 0px; position: absolute; top: 0px; border: 0px; width: 741px; height: 0px;" sandbox="allow-forms allow-popups allow-popups-to-escape-sandbox allow-same-origin allow-scripts allow-top-navigation-by-user-activation" width="741" height="0" frameborder="0" marginwidth="0" marginheight="0" vspace="0" hspace="0" allowtransparency="true" scrolling="no" src="https://googleads.g.doubleclick.net/pagead/ads?client=ca-pub-8123786206223951&amp;output=html&amp;h=280&amp;adk=2020488560&amp;adf=1382423683&amp;pi=t.aa~a.1694800419~i.55~rp.4&amp;w=741&amp;fwrn=4&amp;fwrnh=100&amp;lmt=1690916939&amp;num_ads=1&amp;rafmt=1&amp;armr=3&amp;sem=mc&amp;pwprc=7302649500&amp;ad_type=text_image&amp;format=741x280&amp;url=https%3A%2F%2Fsachgiaokhoa.online%2Fbai-26-moi-ghep-thao-duoc-2674G2942.html&amp;fwr=0&amp;pra=3&amp;rh=186&amp;rw=741&amp;rpe=1&amp;resp_fmts=3&amp;wgl=1&amp;fa=27&amp;uach=WyJtYWNPUyIsIjEzLjAuMCIsIng4NiIsIiIsIjExNS4wLjU3OTAuMTE0IixbXSwwLG51bGwsIjY0IixbWyJOb3QvQSlCcmFuZCIsIjk5LjAuMC4wIl0sWyJHb29nbGUgQ2hyb21lIiwiMTE1LjAuNTc5MC4xMTQiXSxbIkNocm9taXVtIiwiMTE1LjAuNTc5MC4xMTQiXV0sMF0.&amp;dt=1690916938961&amp;bpp=1&amp;bdt=1142&amp;idt=1&amp;shv=r20230727&amp;mjsv=m202307270401&amp;ptt=9&amp;saldr=aa&amp;abxe=1&amp;cookie=ID%3D94547395a8fa18af-22e89ad22ae300c0%3AT%3D1690912062%3ART%3D1690916932%3AS%3DALNI_MYNbCG599XmevrUPCYJ3Zv-Np5EvA&amp;gpic=UID%3D00000d3b2ce8a729%3AT%3D1690912062%3ART%3D1690916932%3AS%3DALNI_MaVlHrwAJeI0KGbMoTcFZDk5BwO2Q&amp;prev_fmts=0x0%2C741x280%2C1122x280%2C741x280%2C741x280%2C741x280%2C741x280%2C741x280&amp;nras=8&amp;correlator=7986640447945&amp;frm=20&amp;pv=1&amp;ga_vid=314055585.1690916938&amp;ga_sid=1690916938&amp;ga_hid=949007896&amp;ga_fc=0&amp;u_tz=420&amp;u_his=50&amp;u_h=1080&amp;u_w=1920&amp;u_ah=1055&amp;u_aw=1920&amp;u_cd=24&amp;u_sd=1&amp;dmc=8&amp;adx=394&amp;ady=3557&amp;biw=1910&amp;bih=970&amp;scr_x=0&amp;scr_y=0&amp;eid=44759876%2C44759927%2C44759842%2C31076088%2C31076484%2C31076578%2C44788442&amp;oid=2&amp;pvsid=2165090342133286&amp;tmod=133538902&amp;uas=0&amp;nvt=1&amp;fc=1408&amp;brdim=0%2C25%2C0%2C25%2C1920%2C25%2C1920%2C1055%2C1920%2C970&amp;vis=1&amp;rsz=%7C%7Cs%7C&amp;abl=NS&amp;fu=128&amp;bc=31&amp;ifi=10&amp;uci=a!a&amp;btvi=7&amp;fsb=1&amp;xpc=yF2Bdpa3Iu&amp;p=https%3A//sachgiaokhoa.online&amp;dtd=284" data-google-container-id="a!a" data-google-query-id="CLeolbyUvIADFe9FwgUdw4QOXQ" data-load-complete="true"></iframe></div></ins></div> <p style="text-align: justify;">Mối ghép bằng chốt gồm: .........................................&nbsp;</p> <p style="text-align: justify;">- Ở mối ghép bằng then, then được đặt trong rãnh then của hai chi tiết được ghép.</p> <p style="text-align: justify;">- Ở mối ghép bằng chốt, chốt là chi tiết hình trụ được đặt trong lỗ xuyên ngang qua hai chi tiết được ghép.</p> <h4 style="text-align: justify;">b) Đặc điểm và ứng dụng</h4> <p style="text-align: justify;">- Mối ghép bằng then và chốt có cấu tạo đơn giản, dễ tháo lắp và thay thế nhưng khả năng chịu lực kém.</p> <p style="text-align: justify;">- Mối ghép bằng then thường dùng để ghép trục với bánh răng, bánh đai, đĩa xích... để truyền chuyển động quay.</p> <p style="text-align: justify;">- Mối ghép bằng chốt dùng để hãm chuyển động tương đối giữa các chi tiết theo phương tiếp xúc hoặc để truyền lực theo phương đó.</p> <h3 style="text-align: justify;" id="ghi-nho">Ghi nhớ</h3> <p style="text-align: justify;">1. Mối ghép tháo được gồm mối ghép bằng ren, then và chốt, có thể tháo rời các chi tiết ở dạng nguyên vẹn như trước khi ghép.</p> <p style="text-align: justify;">2. Công dụng của các mối ghép tháo được là ghép nhiều chi tiết đơn giản thành kết cấu phức tạp, tạo điểu kiện thuận lợi cho việc chế tạo, lắp ráp, bảo quản và sửa chữa.</p> <h3 style="text-align: justify;" id="cacircu-hoi">Câu hỏi</h3> <p style="text-align: justify;">1. Nêu cấu tạo của mối ghép bằng ren và ứng dụng của từng loại.</p> <p style="text-align: justify;">2. Hãy nêu những điểm giống nhau và khác nhau giữa hai mối ghép bằng then và bằng chốt.</p>