Device for installing and detecting hobbing cutter

Abstract

The utility model belongs to the technical field of hobbing cutters, and particularly relates to a device for installing and detecting a hobbing cutter. A hobbing cutter installation and detection device comprises a detection assembly, a first positioning seat and a second positioning seat, the first positioning seat and the second positioning seat are horizontally arranged at intervals, a side opening is formed in one side, facing the second positioning seat, of the first positioning seat, a positioning hole used for positioning a cutter bar is formed in the side, facing the second positioning seat, of the first positioning seat, and a guide hole coaxial with the positioning hole is formed in the second positioning seat. A guide hole is formed in the first positioning seat, an elastically telescopic ejector rod is arranged in the guide hole, the ejector rod has the trend of moving towards the first positioning seat under the action of elasticity, the ejector rod is used for ejecting the cutter bar, and one end of the ejector rod is used for being in contact fit with one end of the cutter bar; the other end of the ejector rod is connected with a driving mechanism enabling the ejector rod to be close to or away from the first positioning seat. The hobbing cutter has the advantage that the cutter bar of the hobbing cutter is prevented from being damaged or bent and deformed during installation and detection.

Description

Technical Field

[0001] The utility model belongs to the technical field of roller cutters, and in particular relates to a roller cutter installation and detection device. Background Art

[0002] The hob needs to be replaced after being used for a period of time. Usually, the hob replacement is carried out on the gear hobbing machine. When replacing the hob, the equipment needs to be shut down, the old hob is removed from the equipment tool rod, and then the new hob is installed into the tool rod. The machine can only be started to continue production after the hob runout is calibrated and qualified. This method of detecting and correcting the runout of the hob on the gear hobbing machine is more troublesome.

[0003] Chinese patent application number 202011441380.4 discloses a device and method for replacing and detecting indexable hob blades. The device tightens the hob core shaft (tool rod) through fixed centers and telescopic centers on both sides and detects the runout value of the hob through a micrometer.

[0004] In the above scheme, the hob and the tool bar can be corrected for runout in advance, so that when the hob is replaced on the gear hobbing machine, the tool bar and the hob can be directly replaced together, saving the time of hob runout detection and correction on the gear hobbing machine. However, in the above scheme, the telescopic top is tightened against the tool bar by turning the hand wheel, and different tool bars have tolerances in length. The above scheme is rigid tightening, which may cause the tool bar to bend and deform, affecting the detection of the runout value. Utility Model Content

[0005] The utility model aims to provide a device for installing and detecting a hob, which can prevent the cutter bar of the hob from being damaged or bent during installation and detection.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a device for installing and detecting a hob, comprising a detection component and a first positioning seat and a second positioning seat arranged horizontally at intervals, the first positioning seat is provided with a lateral opening on the side facing the second positioning seat and a positioning hole for positioning a tool rod, the second positioning seat is provided with a guide hole coaxially arranged with the positioning hole, an elastically retractable push rod is provided in the guide hole, the push rod has a tendency to move toward the first positioning seat under the action of elasticity, the push rod is used to tighten the tool rod, one end of the push rod is used to contact and cooperate with one end of the tool rod, and the other end of the push rod is connected to a driving mechanism that enables the push rod to move closer to or away from the first positioning seat.

[0007] When the device is in use, the operator first inserts the tool rod into the positioning hole, and then the driving mechanism moves the push rod toward the first positioning seat side so that the push rod presses the tool rod; then the detection component is used to detect whether the runout value of the tool rod meets the requirements. If the runout value of the tool rod does not meet the requirements, a new tool rod needs to be replaced; if the runout value of the tool rod meets the requirements, the driving mechanism moves the push rod away from the first positioning seat side, and then the hob is set on the tool rod, and the nut is screwed to limit the axial position of the hob on the tool rod, and then the driving mechanism moves the push rod toward the first positioning seat side again. After the push rod presses the tool rod, the detection component is used to detect the runout value of the hob. If it does not meet the requirements, the push rod loosens the tool rod, and then loosens the nut, rotates the hob angle and tightens the nut again, and repeats the above operation to perform another test.

[0008] The detection component may be any existing component for detecting the outer roundness runout value of a shaft workpiece, such as a dial indicator or a micrometer, etc.

[0009] The driving mechanism may be a cylinder, an electric push rod, etc.

[0010] This solution uses elastic jacking of the push rod to achieve the jacking of the tool bar, simulating the installation of the tool bar on the gear hobbing machine. Elastic jacking can avoid bending the tool bar, thereby ensuring the accuracy of the detection component when detecting runout.

[0011] Preferably, the push rod includes a push rod body and a telescopic tube sleeved outside the push rod body, the outer wall of the telescopic tube contacts and slidably fits with the inner wall of the guide hole, one end of the telescopic tube is connected to the output end of the driving mechanism, and an elastic member is provided in the telescopic tube. Under the action of the elastic member, the push rod body has a tendency to move toward the first positioning seat.

[0012] The telescopic tube cooperates with the guide hole to achieve guidance and avoid deviation when the push rod moves; the push rod body is elastically pressed against the knife rod through the elastic member.

[0013] Preferably, the inner hole of the telescopic tube includes a small diameter section and a large diameter section in sequence from the side close to the first positioning seat to the side away from the first positioning seat, and the push rod body includes a thin section and a thick section in sequence from the side close to the first positioning seat to the side away from the first positioning seat, the thin section is slidably fitted in the small diameter section, the thick section is slidably fitted in the large diameter section, the elastic member is arranged in the large diameter section and one end of the elastic member is abutted against the axial end face of the thick section.

[0014] The telescopic tube is provided with a large diameter section and a small diameter section to form a step structure, and the thick section of the ejector body cannot pass through the thin section, thereby limiting the maximum distance of the axial movement of the ejector body.

[0015] Preferably, a mating hole with a side opening is provided at one end of the push rod body close to the first positioning seat, and the mating hole is used for inserting the end of the tool rod and making the circumferential outer wall of the tool rod contact with the circumferential inner wall of the mating hole.

[0016] The tool rod in the gear hobbing machine is also inserted into a hole when it cooperates with the gear hobbing machine. This solution is different from the conventional use of the top. This solution simulates the state of the tool rod being inserted into the gear hobbing machine, so that the vibration of the tool rod and the hob can be detected more accurately at this time.

[0017] Preferably, the driving mechanism comprises a turntable provided with a first hand wheel for rotating the turntable, and a connecting rod structure is provided between the turntable and the top rod. When the turntable rotates, the connecting rod structure drives the top rod to move closer to or away from the first positioning seat.

[0018] The combination of the connecting rod structure and the turntable makes the structural setting simpler, while the operator can better control the manual operation.

[0019] Preferably, a fixed seat is rotatably connected to the lower part of the turntable, and elastic locking parts that cooperate with each other and a locking hole for inserting the elastic locking parts are provided between the fixed seat and the turntable; when the elastic locking parts are extended into the locking holes, the turntable cannot rotate, and the push rod is in a state where it can tighten the knife rod.

[0020] After the elastic locking piece is inserted into the locking hole, the turntable can be limited so that the turntable cannot rotate. When the operator rotates the turntable to this position (the elastic locking piece is inserted into the locking hole), the push rod can be in a position to press against the knife rod, which is convenient for the operator to operate. When the knife rod needs to be loosened, the operator rotates the turntable to make the elastic locking piece withdraw from the locking hole. The turntable cannot rotate means that the turntable cannot rotate by itself without the interference of artificial external force. Due to the presence of the elastic piece on the push rod, the elastic piece will generate a reaction force on the turntable, but the reaction force cannot make the turntable rotate when the elastic locking piece is locked.

[0021] Preferably, the output end of the elastic locking piece is spherical, and the locking hole is hemispherical.

[0022] The output end of the elastic locking piece is spherical, and the locking hole is spherical, so that when the two are in contact, it is an arc surface contact, which facilitates the elastic locking piece to exit the locking hole.

[0023] Preferably, a rotating member is provided in the first positioning seat, the rotating member is provided with the positioning hole, and the rotating member is driven to rotate by a second hand wheel.

[0024] The second hand wheel is used to drive the rotation of the tool bar, so as to facilitate the detection of the runout value of the tool bar and the hob. Among them, the end of the tool bar has a taper, and the positioning hole is matched with the end of the tool bar. The actual positioning hole is a tapered hole, so when the tool bar is in the positioning hole, there will be suction between the two, so the rotating part can drive the tool bar to rotate.

[0025] Preferably, a limiting rod is provided on the first positioning seat, and the limiting rod is used to be inserted into the rotation groove of the knife rod to limit the rotation of the knife rod.

[0026] When the tool bar is installed on the gear hobbing machine, the tool bar needs to be buckled into the rotation groove of the tool bar and the tool bar needs to be twisted to complete the disassembly and assembly of the tool bar and the gear hobbing machine. The limit rod can be inserted into the rotation groove to limit the circumferential rotation of the tool bar. When the hob needs to be installed on the tool bar, the nut on the tool bar needs to be screwed to fix the hob. By setting the limit rod, the limit rod can limit the rotation of the tool bar, thereby facilitating the screwing of the nut.

[0027] The utility model has the advantage of preventing the knife bar from bending, thereby ensuring that the runout of the knife bar and the hob during installation can be accurately detected. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the utility model.

[0029] Figure 2 It is a structural schematic diagram of the utility model from another perspective.

[0030] Figure 3 It is a schematic diagram of the structure of the hob and cutter bar during installation.

[0031] Figure 4 It is a cross-sectional view of the first positioning seat.

[0032] Figure 5 It is a cross-sectional view of the second positioning seat.

[0033] Figure 6 It is a schematic diagram of the structure of the hob and the cutter rod.

[0034] Figure numbers: 1, bottom plate; 2, first positioning seat; 21, positioning hole; 22, limiting rod; 23, second hand wheel; 24, rotating member; 25, bearing; 3, second positioning seat; 4, rotating disk; 41, fixed seat; 42, first hand wheel; 5, connecting rod; 6, push rod; 61, push rod body; 611, matching hole; 612, large diameter section; 613, small diameter section; 62, telescopic tube; 63, elastic member; 7, elastic locking member; 71, output end of elastic locking member; 8, locking hole; 100, knife rod; 101, rotating groove; 200, hob; 300, nut. DETAILED DESCRIPTION

[0035] The utility model is further described below based on the accompanying drawings and specific embodiments.

[0036] like Figure 6 As shown, a hob 200 is sleeved on the tool bar 100, and the hob 200 is limited by a nut 300 to be axially outwardly positioned. Both ends of the axial direction of the hob 200 have tapers. A rotation groove 101 with a lateral opening is provided on the tool bar 100, and the rotation groove 101 is used for a wrench to buckle and rotate the tool bar 100 to realize the disassembly and assembly between the tool bar 100 and the gear hobbing machine.

[0037] like Figures 1 to 3 As shown, this embodiment discloses a device for installing and detecting a hob cutter, comprising a base plate 1, on which a first positioning seat 2, a second positioning seat 3 and a rotating disk 4 are horizontally arranged from left to right. The first positioning seat 2 is provided with a positioning hole 21 with a lateral opening toward the second positioning seat 3, and a space for placing a cutter bar 100 and a hob cutter 200 is formed between the second positioning seat 3 and the first positioning seat 2. A detection component (not shown in the figure) is also provided on the base plate 1. The detection component is a micrometer, which is fixed to the base plate 1 by a magnetic base.

[0038] like Figures 1 to 4 As shown, the circumferential inner circle of the positioning hole 21 of the first positioning seat 2 is the same as the circumferential outer wall shape of one end of the tool rod 100, and both have a taper. When the tool rod 100 is inserted into the positioning hole 21, one end of the tool rod 100 contacts and cooperates with the inner wall of the positioning hole 21. The first positioning seat 2 is provided with a rotating member 24, and the rotating member 24 is rotatably connected to the first positioning seat 2 through a bearing 25. A second hand wheel 23 is connected to the left side of the rotating member 24, and rotating the second hand wheel 23 can cause the rotating member 24 to rotate. A limiting rod 22 is also fixed on the first positioning seat 2, and the limiting rod 22 can be inserted into the rotation groove 101 of the tool rod 100 to limit the rotation of the tool rod 100.

[0039] like Figures 1 to 3 as well as Figure 5 As shown, the second positioning seat 3 is provided with a guide hole (not shown in the figure) penetrating in the left-right direction and coaxially arranged with the positioning hole 21, and a push rod 6 is provided in the guide hole. The push rod 6 includes a push rod body 61 and a telescopic tube 62, and the telescopic tube 62 is sleeved on the outer side of the push rod body 61. The left end of the push rod body 61 is provided with a matching hole 611 that matches the end of the knife bar 100. The push rod body 61 and the telescopic tube 62 are slidably matched, and the outer wall of the telescopic tube 62 is slidably matched with the inner wall of the guide hole of the second positioning seat 3. The inner hole of the telescopic tube 62 includes a small diameter section and a large diameter section from left to right, and the push rod body 61 includes a thin section 613 and a thick section 612 from left to right, the thin section 613 is slidably fitted in the small diameter section, and the thick section 612 is slidably fitted in the large diameter section. An elastic member 63 is provided in the large diameter section, and the elastic member 63 is a compression spring, and one end of the elastic member 63 is against the axial end face of the thick section 612.

[0040] like Figure 1 and Figure 5 As shown, a fixing seat 41 is fixed on the bottom plate 1, and the upper end of the fixing seat 41 is rotatably connected to the rotating disk 4. The rotating disk 4 is provided with a first hand wheel 42, and the rotating disk 4 is connected to the telescopic tube 62 through a connecting rod 5. The two ends of the connecting rod 5 are respectively hinged to the telescopic tube 62 and the rotating disk 4. The fixing seat 41 is provided with two locking holes 8 opening upward, and the rotating disk 4 is provided with an elastic locking member 7 extending downward. The elastic locking member 7 is any existing spring plunger, and the output end 71 of the elastic locking member is spherical, and the locking hole 8 is hemispherical. When the output end of the elastic locking member extends into the locking hole 8, the rotating disk 4 cannot rotate.

[0041] When the device is in use, the operator first inserts one end of the tool rod 100 into the positioning hole 21, and then the operator turns the first hand wheel 42 so that the connecting rod 5 pushes the push rod 6 toward the tool rod 100, so that the other end of the tool rod 100 extends into the matching hole 611 of the push rod body 61. After the rotating disk 4 rotates 180°, the output end 71 of the elastic locking member will extend into the locking hole 8, thereby completing the locking of the rotating disk 4. At this time, the push rod 6 also presses the tool rod 100. The operator fixes the magnetic base (not shown) equipped with a micrometer on the bottom plate 1. Turning the second hand wheel 23 causes the tool rod 100 to rotate, and the runout value of the tool rod 100 is measured by the micrometer. If the runout value does not meet the requirements, the entire tool rod 100 is replaced. If it meets the requirements, the operator rotates the rotating disk 4 180° so that the push rod 6 loosens the cutter bar 100, and then sleeves the hob 200 and the nut 300 on the cutter bar 100 in sequence. Then, the limit rod 22 is inserted into the rotation groove 101 on the cutter bar 100 so that the cutter bar 100 cannot rotate, and the nut 300 is screwed to fix the hob 200. Repeat the above operation, measure the runout of the hob 200 with a micrometer, if the runout does not meet the requirements, loosen the nut 300, rotate the hob 200 by an angle, and then tighten the nut 300, repeat the above operation until the runout value meets the requirements, if it still does not meet the requirements, it is necessary to replace the new hob 200.

Claims

1. A device for installing and detecting a hob, comprising a detection assembly and a first positioning seat and a second positioning seat arranged horizontally and spaced apart, wherein the first positioning seat is provided with a positioning hole with a lateral opening on one side facing the second positioning seat and used for positioning the cutter bar, characterized in that: The second positioning seat is provided with a guide hole coaxially arranged with the positioning hole, and an elastically retractable push rod is provided in the guide hole. The push rod has a tendency to move toward the first positioning seat under the action of elasticity, and the push rod is used to tighten the knife rod. One end of the push rod is used to contact and cooperate with one end of the knife rod, and the other end of the push rod is connected to a driving mechanism that makes the push rod move closer to or away from the first positioning seat.

2. The device for installing and detecting a hob according to claim 1, characterized in that: The push rod includes a push rod body and a telescopic tube sleeved outside the push rod body, the outer wall of the telescopic tube contacts and slidably cooperates with the inner wall of the guide hole, one end of the telescopic tube is connected to the output end of the driving mechanism, and an elastic member is provided in the telescopic tube. Under the action of the elastic member, the push rod body has a tendency to move toward the first positioning seat.

3. The device for installing and detecting a hob according to claim 2, characterized in that: The inner hole of the telescopic tube includes a small diameter section and a large diameter section in sequence from the side close to the first positioning seat to the side far away from the first positioning seat, and the push rod body includes a thin section and a thick section in sequence from the side close to the first positioning seat to the side far away from the first positioning seat, the thin section is slidably fitted in the small diameter section, the thick section is slidably fitted in the large diameter section, the elastic member is arranged in the large diameter section, and one end of the elastic member is against the axial end face of the thick section.

4. The device for installing and detecting a hob according to claim 2, characterized in that: A mating hole with a lateral opening is provided at one end of the push rod body close to the first positioning seat. The mating hole is used for inserting the end of the knife rod and making the circumferential outer wall of the knife rod contact with the circumferential inner wall of the mating hole.

5. The device for installing and detecting a hob according to any one of claims 1 to 4, characterized in that: The driving mechanism comprises a turntable, on which a first hand wheel for rotating the turntable is arranged, and a connecting rod structure is arranged between the turntable and the push rod. When the turntable rotates, the connecting rod structure drives the push rod to move closer to or away from the first positioning seat.

6. The device for installing and detecting a hob according to claim 5, characterized in that: A fixing seat is rotatably connected to the lower part of the turntable, and elastic locking pieces that cooperate with each other and locking holes for inserting the elastic locking pieces are provided between the fixing seat and the turntable; when the elastic locking piece is inserted into the locking hole, the turntable cannot rotate, and the push rod is in a state of being able to push the knife rod tightly.

7. The device for installing and detecting a hob according to claim 6, characterized in that: The output end of the elastic locking piece is spherical, and the locking hole is hemispherical.

8. The device for installing and detecting a hob according to any one of claims 1 to 4, characterized in that: A rotating member is arranged in the first positioning seat, the rotating member is provided with the positioning hole, and the rotating member is driven to rotate by a second hand wheel.

9. The device for installing and detecting a roller cutter according to any one of claims 1 to 4, characterized in that: The first positioning seat is provided with a limiting rod, and the limiting rod is used to be inserted into the rotation groove of the knife rod to limit the rotation of the knife rod.

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