Workpiece feeding amount adjusting device of screw tap machining equipment

Abstract

The invention provides a workpiece feeding amount adjusting device of screw tap machining equipment, and belongs to the technical field of screw tap machining equipment. The screw tap machining equipment solves the technical problem that existing screw tap machining equipment is difficult to consider both applicability and machining precision. The screw tap machining equipment comprises a machine base, a floating base and a swing arm, the front side and the rear side of the floating base are connected with the machine base through two vertically-arranged elastic steel sheets, an ejector pin is slidably connected to the front side of the floating base, the swing arm is located between the machine base and the floating base, one end of the swing arm is hinged to the machine base, and a supporting shaft is rotationally connected to the floating base; the adjusting device comprises an adjusting gear, a gear ring is further rotationally connected to the swing arm and arranged on the periphery of the supporting shaft in a sleeving mode, the periphery of the gear ring is meshed with the adjusting gear, and an adjusting protruding block protruding forwards in the radial direction is arranged in the area, away from the side where the ejector pin is located, of the inner hole wall of the gear ring. When the swing arm swings, the adjusting protruding block can abut against the supporting shaft and push the floating base to move forwards. The applicability and the machining precision of the screw tap machining equipment can be considered at the same time.

Description

Technical Field

[0001] The invention belongs to the technical field of tap processing equipment and relates to a workpiece feed rate regulating device for tap processing equipment. Background Art

[0002] Taps are one of the most commonly used tools for processing internal threads. The quality of tap processing has an important impact on the effect of threaded connections, so special devices are required to achieve tap processing.

[0003] The patent with application number CN202120546291.X discloses a special fixture for taps, including a workbench, wherein one side of the workbench is provided with a fixture installed in the fixture seat, and the other side is provided with a tailstock, and the fixture and the tailstock are respectively provided with a fixture pin and a tailstock pin for clamping both ends of the tap. The upper and lower sides of the fixture are provided with a pair of clamping arm mounting plates with clamping arms, and the front ends of the clamping arm mounting plates are respectively hinged to the head of the fixture. A cylinder is axially arranged in the clamp, and the head of the cylinder telescopic rod is provided with a conical surface, and sliders are provided on the upper and lower sides of the conical surface. The inner side of the slider is provided with an inclined surface matching the conical surface, and the outer end of the slider is in contact with the rear end of the clamping arm mounting plate. The cylinder drives the slider to move radially and drive the clamping arm mounting plate to rotate, and the clamping arm mounting plate drives the front end of the clamping arm to clamp the outer cylindrical surface of the tap.

[0004] While the aforementioned device facilitates the positioning of taps, it still has drawbacks: the fixture pins and tailstock pins that hold the taps at both ends are fixed in position during the clamping process, making the tap position inadvisable for machining with varying radial feed rates. This lacks applicability, and moving the entire worktable makes it difficult to ensure precise adjustment. Therefore, those skilled in the art would typically consider: installing a screw adjustment mechanism beneath the fixture pins and tailstock pins to adjust the lift height and achieve adjustable feed rates; precisely controlling the dimensions and fit of each component; or improving the structural strength of each transmission component to ensure accurate and reliable transmission. Summary of the Invention

[0005] In view of the above problems existing in the prior art, the present invention provides a workpiece feed rate adjustment device for a tap processing equipment. The technical problem to be solved by the present invention is to give consideration to both the applicability and processing accuracy of the tap processing equipment.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] The cam is fixedly mounted on the support frame, and the cam is fixedly mounted on the support frame, and the cam is installed in a forward direction of the rotation of the support frame to rotate with the cam.

[0008] The tap is positioned on the floating seat during processing, and the swing arm can push the floating seat through the support shaft through horizontal swing, driving the tap to move back and forth relative to the machine base, so as to facilitate the processing of the tap; an annular gear ring is provided on the swing arm to mesh with the adjusting gear, so that the support shaft is located in the gear ring, and an adjusting protrusion protruding forward is provided on the inner hole wall of the gear ring away from the ejector pin. When the swing arm swings, the adjusting protrusion abuts against the outer periphery of the support shaft and pushes the support shaft to move the entire floating seat forward, and then the swing arm swings back and the floating seat can move forward under the action of the elastic steel sheet. After that, it resets to realize reciprocating movement to complete the processing of the tap. When the feed amount of the tap needs to be adjusted, the operator can drive the gear ring to rotate by controlling the rotation of the adjustment gear, thereby changing the position of the adjustment protrusion, thereby changing the size of the contact position with the outer periphery of the support shaft along the swing direction, and realizing the adjustment of the feed amount of the initial position of the support shaft to improve the applicability to the processing requirements of different feed amounts. The gear ring is converted into a small offset of the position of the adjustment protrusion in the swing direction of the swing arm through the circumferential rotation of the shaft, which is conducive to improving the adjustment accuracy and making the processing accuracy higher.

[0009] In the workpiece feed adjustment device for the aforementioned tap machining equipment, the ring gear includes a coaxially downwardly disposed support tube, with the adjustment protrusion located on the inner wall of the support tube. This increases the vertical dimension of the adjustment protrusion, ensuring more stable contact between the vertical side of the adjustment protrusion and the outer periphery of the support shaft, maintaining the vertical position of the support shaft and preventing deflection of the floating seat, thereby ensuring tap machining accuracy.

[0010] In the workpiece feed adjustment device of the above-mentioned tap processing equipment, an elastic lever in the shape of a strip arranged front and back is horizontally slidably penetrated in the swing arm, the rear end of the elastic lever is connected to the machine base, the front end of the elastic lever is located in the support tube and is arranged toward the support shaft, the front end of the elastic lever is tilted to the left or right, and the outer periphery of the support shaft has a plurality of teeth grooves evenly arranged in the circumferential direction. When the swing arm swings backward, the front end of the elastic lever can be inserted into the teeth groove and push the support shaft to rotate. In this way, when the swing arm swings forward, the front end of the elastic lever retracts backward relative to the swing arm, and when the swing arm swings backward, the support shaft pushes the swing arm to move backward. At this time, the front end of the elastic lever extends forward relative to the swing arm and inserts into the outer tooth groove of the support shaft to push the support shaft to rotate in one direction. In this way, the support shaft rotates continuously during the swing arm swing cycle. The elastic lever is elastic and can withstand a certain range of deformation and can reset itself. It can better adapt to the swing environment of the swing arm, avoiding the support shaft always being in the same position and contacting the adjustment bump for a long time to cause deformation and lead to processing errors, thereby improving processing accuracy.

[0011] In the workpiece feed rate adjustment device for the aforementioned tap processing equipment, the swing arm has a strip-shaped insertion hole, and the elastic lever is inserted into the insertion hole. The rear end of the insertion hole is flared. This helps reduce interference between the elastic lever and the edge of the insertion hole when the rear end is fixed, thus preventing damage and ensuring smooth movement.

[0012] In the workpiece feed adjustment device for the aforementioned tap processing equipment, the vertical side surface of the adjustment projection has a horizontally arranged strip-shaped clearance hole, through which the elastic lever extends. This provides clearance space for the elastic lever during adjustment and rotation of the ring gear, thereby avoiding interference.

[0013] In the workpiece feed adjustment device for the aforementioned tap machining equipment, annular frustum-shaped bushings are sleeved on both the upper and lower ends of the support shaft, with the smaller ends of the bushings facing outward. Both bushings are rotatably connected to the floating seat. This facilitates the support shaft to receive downward and upward calibrating forces, respectively, when subjected to radial forces. This prevents vertical displacement of the support shaft during operation and ensures stable contact between the support shaft, the adjustment protrusion, and the elastic lever.

[0014] In the workpiece feed adjustment device of the tap processing equipment, a disc-shaped adjustment seat is rotatably connected to the floating seat, the bottom of the adjustment seat is cylindrical, and a transmission column is connected to the bottom of the adjustment seat. A pin shaft 1 is passed through the upper end of the transmission column in front and back. The inner hole wall of the adjustment seat has two strip-shaped through holes arranged up and down. The upper end of the transmission column is located in the inner hole of the bottom of the adjustment seat and is spaced apart from the inner hole wall of the bottom of the adjustment seat. The two ends of the pin shaft 1 are respectively located in the two through holes. The lower end of the transmission column is connected to the upper end of the adjustment gear. In this way, the transmission column has space to move up and down, and while realizing the rotation of the adjustment gear from the outside of the floating seat, it ensures the adaptability effect when the floating seat produces a high and low position change relative to the swing arm, avoiding the interference and jamming of the adjustment component, resulting in the inability to adjust. At the same time, when the floating seat produces a position deviation with the swing arm in the left and right directions, the component can deflect around the pin shaft 1 to compensate, and no rigid interference will occur.

[0015] In the workpiece feed adjustment device of the tap processing equipment, the upper end of the adjustment gear is coaxially fixedly connected to a transmission sleeve, the upper end of the transmission sleeve has an upwardly penetrating notch, the lower end of the transmission column is in the shape of a cylinder with an open end facing downward, the upper end of the transmission sleeve is located in the inner hole of the lower end of the transmission column, and a gap is left between the outer periphery of the transmission sleeve and the inner hole wall of the lower end of the transmission column, and the lower end of the transmission column is penetrated by two pins on the left and right sides, and the two pins are located in the notch. In this way, the lower end of the transmission column and the transmission sleeve are circumferentially positioned by the two pins, which can stabilize the transmission. At the same time, the first pin cooperates with the second pin, so that the floating seat can adapt to the position changes in the front, back, left and right directions relative to the swing arm. The upward penetrating notch facilitates the second pin installed on the lower end of the transmission column to be directly placed at least in the notch, making assembly more convenient and adapting to the upper and lower movable space of the transmission column to avoid interference.

[0016] In the workpiece feed adjustment device for the aforementioned tap processing equipment, the transmission column has a T-shaped axial cross-section, with the large end of the transmission column facing downward. A compression spring is disposed between the upper side of the large end of the transmission column and the lower side of the adjustment seat, and the compression spring is sleeved around the periphery of the transmission column. This compression spring ensures that the transmission column always has a downward movement tendency and can reset itself, preventing the transmission column from moving upward due to external force, causing the second pin to fall out of the notch and thus preventing transmission.

[0017] In the workpiece feed adjustment device of the tap processing equipment, the center of the upper side of the adjustment seat has a hexagonal countersunk hole. This requires a hexagonal wrench to control the rotation of the adjustment seat, preventing the adjustment seat from easily rotating due to external influences and affecting the feed adjustment state.

[0018] Compared with the prior art, the advantages of the present invention are as follows:

[0019] The workpiece feed rate adjustment device of this tap processing equipment can adjust the feed rate of the initial position of the support shaft to improve applicability to processing requirements with different feed rates. The ring gear converts the circumferential rotation of the shaft into a small offset of the position of the adjustment protrusion in the swing direction of the swing arm, which is beneficial to improving processing accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of this embodiment.

[0021] Figure 2 It is a schematic diagram of the three-dimensional structure of this embodiment without the floating seat.

[0022] Figure 3 It is a three-dimensional structural diagram of the local structure of this embodiment.

[0023] Figure 4 yes Figure 3 Schematic diagram of the three-dimensional explosion of the structure.

[0024] Figure 5 It is a schematic diagram of the three-dimensional structure of the swing arm, ring gear and elastic lever assembly in this embodiment.

[0025] Figure 6 yes Figure 5 Enlarged view of part A in .

[0026] Figure 7 2 is a schematic diagram of the top structure of this embodiment.

[0027] Figure 8 yes Figure 7 BB cross-section diagram in .

[0028] Figure 9 yes Figure 8 Enlarged view of part D in .

[0029] Figure 10 yes Figure 7 Schematic diagram of CC cross section in .

[0030] In the figure, 1. machine base; 2. floating seat; 3. swing arm; 31. socket; 4. elastic steel sheet; 5. ejector pin; 6. support shaft; 61. tooth groove; 7. adjusting gear; 8. gear ring; 81. adjusting protrusion; 811. clearance hole; 82. support tube; 9. elastic lever; 101. bushing; 102. adjusting seat; 1021. hexagonal countersunk hole; 1022. through hole; 103. transmission column; 104. transmission sleeve; 1041. notch; 105 pin one; 106. pin two; 107. compression spring. DETAILED DESCRIPTION

[0031] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0032] like Figure 1 、 Figure 2 As shown, the tap processing equipment includes a machine base 1, a floating seat 2, and a swing arm 3. The front and rear sides of the floating seat 2 are connected to the machine base 1 through two vertically arranged elastic steel sheets 4. The front side of the floating seat 2 is slidably connected with a pin 5 for positioning the tap. The swing arm 3 is located between the machine base 1 and the floating seat 2. One end of the swing arm 3 is hinged to the machine base 1 so that the other end of the swing arm 3 can swing back and forth horizontally under the cooperation of the cam and the elastic member. The specific driving structure for realizing the swing of the swing arm 3 can refer to the existing technology. The swing arm 3 is also rotatably connected to a ring gear 8, and a vertically arranged support shaft 6 is provided in the ring gear 8. The floating seat 2 is rotatably connected to a disc-shaped adjustment seat 102.

[0033] like Figure 3 、 Figure 4 、 Figure 10 As shown, the adjusting device includes an adjusting gear 7 which is rotatably connected to the swing arm 3 and is vertically arranged. The outer periphery of the ring gear 8 is meshed with the adjusting gear 7. The inner hole wall of the ring gear 8 has a radially protruding adjusting protrusion 81. The ring gear 8 has a supporting tube 82 which is coaxially arranged downward, and the adjusting protrusion 81 is located on the inner wall of the supporting tube 82. The outer periphery of the support shaft 6 has a number of tooth grooves 61 evenly arranged in the circumferential direction, the vertical side of the adjusting protrusion 81 has a horizontally arranged strip-shaped makeshift hole 811, the bottom of the adjusting seat 102 is cylindrical, and a transmission column 103 is provided under the adjusting seat 102. A pin shaft 105 is passed through the upper end of the transmission column 103 in front and back, and the bottom inner hole of the adjusting seat 102 has two strip-shaped through holes 1022 arranged up and down. The upper end of the transmission column 103 is located in the inner hole at the bottom of the adjusting seat 102 and the two ends of the pin shaft 105 are respectively located in the two through holes 1022 and can move up and down. A movable gap is left between the outer periphery of the upper end of the transmission column 103 and the inner hole wall at the bottom of the adjusting seat 102, and the lower end of the transmission column 103 is transmission-connected to the upper end of the adjusting gear 7. The upper end of the adjustment gear 7 is coaxially fixedly connected to a transmission sleeve 104. The upper end of the transmission sleeve 104 has an upwardly extending notch 1041. The lower end of the transmission column 103 is cylindrical, with its upper end located in the inner hole of the lower end of the transmission column 103, and a gap is left between the outer periphery of the transmission sleeve 104 and the inner hole wall of the lower end of the transmission column 103. The lower end of the transmission column 103 is penetrated by two pins 106 on both sides, and the pins 106 are located in the notch 1041. The transmission column 103 has a T-shaped axial cross-section, with the large end of the transmission column 103 facing downward. A compression spring 107 is installed between the upper side of the large end of the transmission column 103 and the lower side of the adjustment seat 102, and the compression spring 107 is sleeved on the outer periphery of the transmission column 103. The center of the upper side of the adjustment seat 102 has a conventional hexagonal countersunk hole 1021.

[0034] like Figure 1-2 、 Figure 5-9 As shown, the upper and lower ends of the support shaft 6 are rotatably connected to the floating seat 2. An adjustment protrusion 81 is located in an area away from the side where the ejector pin 5 is located and protrudes forward. When the swing arm 3 swings, the adjustment protrusion 81 can abut against the support shaft 6 and push the floating seat 2 forward. A strip-shaped elastic lever 9 is inserted horizontally and slides through the swing arm 3. The rear end of the elastic lever 9 is connected to the base 1. The front end of the elastic lever 9 is located within the support tube 82 and is positioned toward the support shaft 6. The front end of the elastic lever 9 is tilted to the left. When the swing arm 3 swings backward, the front end of the elastic lever 9 can be inserted into the tooth groove 61 and push the support shaft 6 to rotate. The swing arm 3 has a strip-shaped insertion hole 31. The elastic lever 9 is inserted into the insertion hole 31. The front end of the insertion hole 31 is connected to the clearance hole 811. The rear end of the insertion hole 31 is flared, and the elastic lever 9 extends through the clearance hole 811. Both upper and lower ends of the support shaft 6 are sleeved with annular frustum-shaped bushings 101 , with the small ends of the bushings 101 facing outwards. Both bushings 101 are rotatably connected to the floating seat 2 .

[0035] Before processing the tap, the lock on the ring gear 8 by the existing structure can be released, and then the adjustment seat 102 can be controlled to rotate by a hexagonal wrench, thereby driving the adjustment gear 7 to rotate and causing the ring gear 8 to rotate circumferentially. At this time, the contact position between the vertical side surface of the adjustment protrusion 81 and the outer periphery of the support shaft 6 changes, thereby changing the relative position of the support shaft 6 and the swing arm 3, thereby achieving fine adjustment of the initial offset of the floating seat 2 to meet the precise adjustment of different feed amounts of the tap.

[0036] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope of the appended claims.

Claims

1. A workpiece feed adjustment device for a tap processing equipment, the tap processing equipment comprising a machine base (1), a floating seat (2) and a swing arm (3), the front and rear sides of the floating seat (2) are connected to the machine base (1) through two vertically arranged elastic steel sheets (4), the front side of the floating seat (2) is slidably connected to a pin (5) for positioning the tap, the swing arm (3) is located between the machine base (1) and the floating seat (2), one end of the swing arm (3) is hinged to the machine base (1) so that the other end of the swing arm (3) can swing back and forth horizontally, the floating seat (2) is rotatably connected to a vertically arranged support shaft (6), the adjustment device comprises an adjustment gear (7) rotatably connected to the swing arm (3) and vertically arranged, characterized in that The swing arm (3) is also rotatably connected to a ring gear (8), which is sleeved on the outer periphery of the support shaft (6) and meshed with the adjusting gear (7). The inner hole wall of the ring gear (8) is provided with an adjusting protrusion (81) protruding radially forward on the side away from the ejector pin (5). When the swing arm (3) swings, the adjusting protrusion (81) can abut against the support shaft (6) and push the floating seat (2) to move forward.

2. The workpiece feed rate adjustment device for a tap processing device according to claim 1, characterized in that: The gear ring (8) has a support tube (82) coaxially arranged downward, and the adjustment protrusion (81) is located on the inner wall of the support tube (82).

3. The workpiece feed rate adjustment device for a tap processing device according to claim 2, characterized in that: An elastic shift rod (9) arranged in a strip shape and arranged front and back is horizontally slidably penetrated in the swing arm (3); the rear end of the elastic shift rod (9) is connected to the machine base (1); the front end of the elastic shift rod (9) is located in the support tube (82) and is arranged toward the support shaft (6); the front end of the elastic shift rod (9) is tilted to the left or right; the outer periphery of the support shaft (6) has a plurality of tooth grooves (61) uniformly arranged in the circumferential direction; when the swing arm (3) swings backward, the front end of the elastic shift rod (9) can be inserted into the tooth groove (61) and push the support shaft (6) to rotate.

4. The workpiece feed rate regulating device for a tap processing device according to claim 3, characterized in that: The swing arm (3) has a strip-shaped insertion hole (31) in it, and the elastic shift rod (9) is inserted into the insertion hole (31). The rear end of the insertion hole (31) is in a flared shape.

5. The workpiece feed rate regulating device for a tap processing device according to claim 3, characterized in that: The vertical side surface of the adjusting protrusion (81) has a horizontally arranged strip-shaped clearance hole (811), and the elastic shift rod (9) passes through the clearance hole (811).

6. The workpiece feed rate regulating device for a tap processing device according to claim 1, 2, 3, 4 or 5, characterized in that: The upper and lower ends of the support shaft (6) are both sleeved with annular frustum-shaped bushings (101), the small ends of the bushings (101) are arranged outwards, and the two bushings (101) are both rotatably connected to the floating seat (2).

7. The workpiece feed rate regulating device for a tap processing device according to claim 1, 2, 3, 4 or 5, characterized in that: The floating seat (2) is rotatably connected to a disc-shaped adjustment seat (102), the bottom of the adjustment seat (102) is cylindrical, and the bottom of the adjustment seat (102) is connected to a transmission column (103), and a pin shaft (105) is passed through the upper end of the transmission column (103) at the front and rear ends. The inner hole wall of the adjustment seat (102) has two strip-shaped through holes (1022) arranged up and down. The upper end of the transmission column (103) is located in the inner hole of the bottom of the adjustment seat (102) and is spaced from the inner hole wall of the bottom of the adjustment seat (102). The two ends of the pin shaft (105) are respectively located in the two through holes (1022). The lower end of the transmission column (103) is transmission-connected to the upper end of the adjustment gear (7).

8. The workpiece feed rate regulating device for a tap processing device according to claim 7, characterized in that: The upper end of the adjusting gear (7) is coaxially fixedly connected with a transmission sleeve (104), the upper end of the transmission sleeve (104) has an upwardly penetrating notch (1041), the lower end of the transmission column (103) is in a cylindrical shape with an open end facing downward, the upper end of the transmission sleeve (104) is located in the inner hole of the lower end of the transmission column (103), and a gap is left between the outer periphery of the transmission sleeve (104) and the inner hole wall of the lower end of the transmission column (103), and the lower end of the transmission column (103) is penetrated by two pin shafts (106) on the left and right, and the two pin shafts (106) are located in the notch (1041).

9. The workpiece feed rate regulating device for a tap processing device according to claim 8, characterized in that: The transmission column (103) has a T-shaped axial cross-section, and the large end of the transmission column (103) is arranged downward. A compression spring (107) is arranged between the upper side surface of the large end of the transmission column (103) and the lower side surface of the adjustment seat (102), and the compression spring (107) is sleeved on the outer periphery of the transmission column (103).

10. The workpiece feed rate regulating device for a tap processing device according to claim 7, characterized in that: A hexagonal countersunk hole (1021) is provided at the center of the upper side surface of the adjustment seat (102).

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