How to calculate the force of cylindrical cam
Publish: 2021-05-04 17:29:08
1. 3. Cylindrical cam mechanism with oscillating follower:
the cylindrical cam becomes a moving cam when it expands into a plane. Therefore, the unfolding contour curve can be drawn by using the design method of plane cam
given the average cylinder radius RM, follower length L, roller radius RT, follower motion law y = y (f) and cam rotation direction, the unfolded profile curve can be approximately drawn as follows:
1) make O-A line perpendicular to the cam rotation axis, make ∠ oab0 = ymax / 2, so as to obtain the initial position Ab0 of the follower. Then, according to the y-f line, draw the various positions of the follower Ab1 & # 39 AB2'、 AB3'、…
2) take the length of line segment B0 as 2prm. Along the (- V1) direction, divide B0 into equal parts corresponding to the horizontal axis of the displacement line diagram of the follower, and get points C1, C2, C3,..., through which draw a series of arcs with the center on the O-A line and the radius equal to L
3) from B1 to 39; Make an arc of horizontal line crossing C1 at point B1, from B2 to 39; Make an arc with a horizontal line crossing C2 at points B2. Connecting B0, B1, B2,... Into smooth curves, the theoretical contour curve of the expanded drawing is obtained
4) draw a series of rollers with the points on the theoretical contour curve as the center of the circle, and then draw two envelope lines to obtain the actual contour curve of the unfolded cam (not shown in the figure)
because the profile groove of the cylindrical cam is located on the cylindrical surface, when the cylindrical roller in contact with the groove moves in a plane arc with the follower, the roller will insert into the cam groove at different depths. Because the relative motion between the roller and the cam in the direction of the oscillating axis of the follower is not considered in the above design process, there is a deviation between the actual motion law of the follower and the expected motion law in theory, so it is an approximate design method. In order to eliminate the design deviation, it is necessary to modify the theoretical contour curve, or according to the relative spatial motion relationship between the roller and the cam, use the analytical method to accurately design the cam contour surface
in order to rece the variation of the depth of the roller inserted into the cam slot, the following methods can be adopted:
1) rece the maximum swing angle of the follower
2) make the middle position ab of the follower staggered and perpendicular to the cam axis
3) take the distance between the oscillating axis of the follower and the axis of the cam as
cylindrical cam mechanism with translating follower can be regarded as a special case of cylindrical cam mechanism with oscillating follower. The design method of cam profile curve is similar to that mentioned above, but the theoretical profile curve of cam does not need to be modified.
the cylindrical cam becomes a moving cam when it expands into a plane. Therefore, the unfolding contour curve can be drawn by using the design method of plane cam
given the average cylinder radius RM, follower length L, roller radius RT, follower motion law y = y (f) and cam rotation direction, the unfolded profile curve can be approximately drawn as follows:
1) make O-A line perpendicular to the cam rotation axis, make ∠ oab0 = ymax / 2, so as to obtain the initial position Ab0 of the follower. Then, according to the y-f line, draw the various positions of the follower Ab1 & # 39 AB2'、 AB3'、…
2) take the length of line segment B0 as 2prm. Along the (- V1) direction, divide B0 into equal parts corresponding to the horizontal axis of the displacement line diagram of the follower, and get points C1, C2, C3,..., through which draw a series of arcs with the center on the O-A line and the radius equal to L
3) from B1 to 39; Make an arc of horizontal line crossing C1 at point B1, from B2 to 39; Make an arc with a horizontal line crossing C2 at points B2. Connecting B0, B1, B2,... Into smooth curves, the theoretical contour curve of the expanded drawing is obtained
4) draw a series of rollers with the points on the theoretical contour curve as the center of the circle, and then draw two envelope lines to obtain the actual contour curve of the unfolded cam (not shown in the figure)
because the profile groove of the cylindrical cam is located on the cylindrical surface, when the cylindrical roller in contact with the groove moves in a plane arc with the follower, the roller will insert into the cam groove at different depths. Because the relative motion between the roller and the cam in the direction of the oscillating axis of the follower is not considered in the above design process, there is a deviation between the actual motion law of the follower and the expected motion law in theory, so it is an approximate design method. In order to eliminate the design deviation, it is necessary to modify the theoretical contour curve, or according to the relative spatial motion relationship between the roller and the cam, use the analytical method to accurately design the cam contour surface
in order to rece the variation of the depth of the roller inserted into the cam slot, the following methods can be adopted:
1) rece the maximum swing angle of the follower
2) make the middle position ab of the follower staggered and perpendicular to the cam axis
3) take the distance between the oscillating axis of the follower and the axis of the cam as
cylindrical cam mechanism with translating follower can be regarded as a special case of cylindrical cam mechanism with oscillating follower. The design method of cam profile curve is similar to that mentioned above, but the theoretical profile curve of cam does not need to be modified.
2. This is related to the torque T, pitch diameter D and meshing angle a of the gear. You can solve it as soon as you draw a picture
3. Unknown_Error
4. Unknown_Error
5. Hello, I see that your question has not been answered for a long time, but if the question is overe, no one will answer it, and your reward points will be confiscated! So I'd like to give you a few suggestions:
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first, you can choose to ask questions in the correct category, so that more people will know the answers to your questions and more people will answer them
Second, you can go to the forum of professional websites related to your problems. There are many professionals gathered there, and they will certainly be able to solve your problems for you<
Third, you can ask your online friends, they will be more sincere and enthusiastic for you to find the answer, and even can go to the relevant website to search directly.
Fourth, there are many professional forums and knowledge platforms on the Internet, and there are a lot of information on them. When I encounter professional problems, I always go to the forum to seek solutions
five, ask your questions in detail and clearly! Make it easier for people to understand what it means
thank you for taking my advice!!
6. Optical design and parameter determination are required
7. school report: http://..com/link?url=-_Wzi6P71Ke493CogBQmRdvtC1-D_B_CZ8LOitDoGw_
8.
Answer: first, the difference between end face cam and cylindrical cam
the difference between end face cam and cylindrical cam is the composition
The end face cam is a cam whose contour curve is located at the end of the cylinder and rotates around its axis The cylindrical cam is a component with a curve groove on the cylindrical surface or a curve profile on the cylindrical end face There are some common points between end face cam and cylindrical cam In the cylindrical cam mechanism, when the cam rotates at the same speed, the follower moves in the plane parallel to the axis of the cam, so the relative motion between the cam and the follower is spatial motion3. In the cylindrical cam mechanism, the follower can get a larger stroke through the cylindrical cam or the end cam with a small diameter
9. On the first day, start from the trestle and walk eastward along the coastal tourist walk. Zhanqiao Park - Lu Xun Park - No.1 bathing beach - Huiquan square - No.2 bathing beach - Badaguan Scenic Area - No.3 bathing beach - May 4th Square - Olympic Sailing Center - hitchhiking (boarding place: Zhuhai Branch Road) - Polar Ocean World - hitchhiking - & gt; Shilaoren beach trestle: you can go to the end of the trestle to enjoy the sea view and get in close contact with seagulls; Lu Xun Park: a path built in accordance with the trend winds through the park, enjoying the pleasure of shuttling through the mountains and forests and enjoying the beautiful sea view, which is very pleasant; The first bathing beach: the sand quality of the bathing beach is not very good, but there are a lot of people swimming and sunbathing. The second and third bathing beaches are also in the same situation; Badaguan scenic spot: the so-called Badaguan is because there are eight roads here (now it has increased to ten), which are named after eight passes, namely Shaoguan Road, Jiayuguan Road, Hanguguan Road, Zhengyangguan Road, Linhuaiguan Road, ningwuguan Road, Zijingguan road and Juyongguan road. Here is the best embodiment of Qing; Red tiles, green trees, blue sea and blue sky; It is a scenic spot with unique features. May 4th Square: built in accordance with the office building of Qing municipal government, it is a landmark building in Qing. Olympic Sailing Center: sometimes the Olympic Sailing Center venues are not open to the public, and the external venues are basically open. Route Description: after arriving at the Olympic Sailing Center, you can enjoy lunch, which is provided by yourself; After lunch, take the bus to the Polar Aquarium. The above attractions are free (self funded projects are meaningless and can be ignored). Route: walk southeast along Donghai Middle Road, take No. 317 at Zhuhai Branch Road station, pass 6 stops, and get off at polar ocean world station. The fare is 1 yuan per person. Polar Ocean World: the interior decoration of the venue is modeled on the polar world. A variety of marine animals are presented in front of us. There are also shocking animal performances. Four beluga whales, eight dolphins and six sea lions perform on the same stage. In addition to the polar Pavilion, there is also a happy theater, with funny performances of various marine animals. Ticket price: Polar Museum + happy theater full price ticket 150 yuan, student package ticket: 99 yuan / 2 people. Total: 249 yuan, 83 yuan per person. Route: take No.317, pass 6 stops and get off at Haier Road station. The fare is 1 yuan per person. Shilaoren bathing beach: in the east of the bathing beach, 100 meters away from the shore, there is a 17 meter high stone column, which is like an old man sitting in the blue wave. It is called "Shilaoren". This huge stone is accompanied by a beautiful myth. Legend has it that Shilaoren was a diligent and kind-hearted fisherman living at the foot of Wushan mountain, and depended on his smart and beautiful daughter. But one day, his daughter was robbed into the Dragon Palace by the crown prince. The poor old man called at the seaside day and night. Despite the fact that the sea water had no knees, he looked forward to the white temples and bowed back, still waiting for the seaside. Later, while the old man was sitting in the water, leaning on his gills and concentrating, the Dragon King used magic to make the old man's body graally ossified into a stone. When the girl heard about her father, she rushed out of the Dragon Palace and ran to her father, who had turned into a stone. The flowers on her head are blown down to the island by the sea breeze and take root, which makes changmenyan and Daguan island full of wild winter flowers. When the girl approached Laoshan, the Dragon King used magic to turn the girl into a huge reef and set her on the sea alone. From then on, father and daughter could only face each other across the sea and never get together. Later, people called this huge reef "daughter island". Route Description: take the bus from Shilaoren bathing beach back to the trestle. Return on the first day: take bus No.317, pass 20 stops, get off at Zhongshan Park Station, transfer to bus No.6, pass 5 stops, get off at Zhanqiao station, the fare is 2 yuan / person. The next day, I went to Laoshan Scenic Spot and strolled around Taidong in the evening. Laoshan - hitchhiking - & gt; Route of Taidong Commercial Street: take a bus from Zhanqiao to Laoshan Scenic spot. Route: take special line 802 or 304, pass 21 stops and get off at Dahedong customer service center. The ticket price is 5 yuan per person. Laoshan Scenic Spot: a 5A scenic spot. There are many small scenic spots in the scenic spot. You can take a free roller coaster in the scenic spot. There are waiting points between the scenic spots. You can enjoy all kinds of scenery on the bus and feel the stimulation of the real roller coaster. After getting off, you can walk around some scenic spots and follow the signs. The whole route is completed according to the route of the tour bus. It enters from Dahedong customer service center and goes out from Yangkou customer service center. Ticket price of students in Laoshan Scenic Spot: 85 yuan per person. Route: take a bus from Laoshan Scenic Area to Taidong.
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