A controllable fine-tuning precision fixture and workpiece clamping method

Abstract

The present invention relates to the field of precision machining technology, and in particular to a controllable fine-tuning precision fixture and a workpiece clamping method, which realizes a precision fixture suitable for clamping and positioning a variety of precision bent pipes and can be quickly aligned and positioned with a tapping drill bit. A controllable fine-tuning precision fixture and a workpiece clamping method, comprising: a clamping mechanism, comprising: a first baffle, a second baffle, a fixed clamp and a movable clamp, wherein the outer sides of the first baffle and the second baffle are respectively provided with a fixed seat, the first baffle and the second baffle are connected by a positioning shaft, and the first baffle and the second baffle are limited and rotated with the fixed seat. The present invention realizes the precise clamping and positioning of bent pipes at different angles, can realize precise fine-tuning positioning of the bent pipe and the tapping drill bit, can realize rapid tapping positioning of the second end of the bent pipe, and realizes a precision fixture for bent pipes that is easy to use, has precise positioning, good functionality, good applicability, and efficient tapping positioning.

Description

Technical Field

[0001] The present invention relates to the field of precision machining technology, and in particular to a controllable fine-tuning precision fixture and a workpiece clamping method. Background Art

[0002] Tapping is a common machining method. When tapping the two ends of precision elbows, precision fixtures are key to ensuring workpiece machining accuracy.

[0003] In the tapping process of precision elbows, such as 30° elbows, 45° elbows and 90° elbows, taking the 45° elbow as an example, the tapping port of the elbow must be ensured to be coaxial with the tapping drill bit above. At the same time, after the tapping process of one port of the elbow is completed, if the elbow needs to be re-clamped and positioned at another port, the tapping efficiency of the precision elbow may be reduced. For the multiple positioning processing method, if the tapping of one port is wrong, the entire precision elbow will be scrapped, especially when the worker manually positions the fixture to clamp the elbow, how to process and position more efficiently and accurately is very important for the tapping process of precision elbows. Therefore, a controllable fine-tuning precision fixture and workpiece clamping method are proposed to realize a precision fixture suitable for clamping and positioning of a variety of precision elbows, which can be quickly aligned and positioned with the tapping drill bit, thereby improving product competitiveness and enriching market diversity. Summary of the Invention

[0004] The purpose of the present invention is to provide a controllable fine-tuning precision fixture and a workpiece clamping method, so as to realize a precision fixture which is suitable for clamping and positioning a variety of precision bent pipes and can be quickly aligned and positioned with a tapping drill bit.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A controllable fine-tuning precision fixture, comprising:

[0007] The clamping mechanism includes: a first baffle, a second baffle, a fixed clamping plate and a movable clamping plate, the outer sides of the first baffle and the second baffle are respectively provided with a fixed seat, the first baffle and the second baffle are connected by a positioning shaft, the first baffle and the second baffle are limited and rotated with the fixed seat, and the axis of rotation is collinear with the axis of the positioning shaft, the bottom ends of the fixed clamping plate and the movable clamping plate are respectively slidably sleeved on the positioning shaft, a baffle is fixedly installed between the first baffle and the second baffle, the center line of the fixed clamping plate is in a vertical state, and the fixed clamping plate and the baffle slide The first baffle is provided with a stopper between the first baffle and the second baffle, the stopper is in contact with the outer side of the movable clamping plate, and the stopper is provided with an insert rod passing through the movable clamping plate, the movable clamping plate is provided on a side close to the first baffle, and the side end surface of the movable clamping plate close to the second baffle is located on the same vertical plane as the side end surface of the fixed clamping plate, the movable clamping plate is limited and rotated in cooperation with the first baffle, a stop screw that abuts against the movable clamping plate is installed on the first baffle, a pressure roller is provided between the first baffle and the second baffle, and the pressure roller and the second baffle are detachably installed in the vertical direction;

[0008] The information collection mechanism includes a control box and a bracket, a two-way rangefinder is mounted on the top of the bracket, a first rangefinder and a second rangefinder are mounted in the middle of the bracket, and are not on the same vertical line. The first rangefinder, the second rangefinder, and the two-way rangefinder are electrically connected to the control box, and the outer sides of the second baffle and the fixed clamping plate are connected to the index plate, respectively. The first rangefinder and the second rangefinder are respectively facing the clamping mechanism;

[0009] The fine-tuning positioning mechanism includes a base plate, a fine-tuning seat is provided on the base plate, a lateral adjustment rod is provided laterally above the base plate, and is used to drive the fine-tuning seat to adjust laterally based on the base plate, and longitudinal adjustment rods are provided longitudinally above the base plate, and are used to drive the fine-tuning seat to adjust longitudinally based on the base plate, the fixed base is installed on the fine-tuning seat, and the bracket and control box are installed on the base plate.

[0010] Preferably, a movable hole is opened in the fine-tuning seat, the lateral adjustment rod passes through the movable hole, two rings are sleeved on the lateral adjustment rod, the two rings are fitted with two sides of the fine-tuning seat, the outer diameter of the ring is larger than the height of the movable hole, and lateral side plates are respectively installed on both sides of the base plate, and the extending end of the lateral adjustment rod is screwed into the corresponding lateral side plate.

[0011] Preferably, two longitudinal side plates are respectively installed on both longitudinal sides of the base plate, the longitudinal adjustment rod is screwed through the corresponding longitudinal side plates, and the extended end of the longitudinal adjustment rod abuts against the side end surface of the fine-tuning seat.

[0012] Preferably, the inner side of the index plate connected to the fixed clamping plate is at a distance a from the inner side of the fixed clamping plate; the inner side of the index plate connected to the second baffle is at a distance b from the inner side of the second baffle, a and b are equal, and the inner side of the fixed clamping plate and the inner side of the second baffle are respectively the workpiece clamping sides.

[0013] Preferably, when the two-way rangefinder is located between the two index plates, the first rangefinder is opposite to the side end surface of the second baffle, the ranging port of the second rangefinder is located on the central vertical plane of the two-way rangefinder, and the central vertical plane is parallel to the second baffle.

[0014] Preferably, the first baffle and the second baffle are respectively a quarter fan-shaped structure, a plurality of positioning screw sleeves are installed in an arc array on the first baffle, the retaining screw is threadedly connected to the positioning screw sleeve, a positioning cap is installed on the movable clamping plate, and the extending end of the retaining screw is plugged into the positioning cap.

[0015] Preferably, a slide groove is vertically opened on the top of the second baffle, a screw seat is fixedly installed on the outer bottom of the slide groove, a slide seat is slidingly arranged in the slide groove, a longitudinal screw rod is screwed through the inner thread of the slide seat, and the bottom end of the longitudinal screw rod is screwed and connected with the screw seat thread, and the pressure roller is fixedly connected to the slide seat.

[0016] Preferably, the outer end faces of the first baffle and the second baffle have hexagonal holes at their axis centers, and threaded circular holes at their inner end faces. A plurality of positioning holes are provided in an arc-shaped array on the fixing seat. A shift rod is provided on the outer side of the fixing seat, and a cylindrical block and a hexagonal column are provided coaxially on the inner side of the bottom end of the shift rod. The hexagonal column is plugged into the hexagonal hole, and the cylindrical block is movably fitted with the fixing seat. The top of the shift rod is threadedly connected to the corresponding positioning hole using a locking screw.

[0017] Preferably, a PLC mainboard and a display screen are provided in the control box. The PLC mainboard is used to receive and process measurement data from the bidirectional rangefinder, the first rangefinder and the second rangefinder, and to calculate the distance the second rangefinder needs to move based on the loaded calculation module.

[0018] A controllable fine-tuning workpiece clamping method, the clamping comprising:

[0019] Bend clamping and positioning: Determine the angle of the bend, limit the rotation of the movable clamping plate, and make the angle between the movable clamping plate and the fixed clamping plate the same as the angle of the bend. Place the bend in the movable clamping plate and the fixed clamping plate, and use the positioning screw to clamp the bend between the second baffle, the fixed clamping plate, the movable clamping plate, the baffle bar and the baffle seat. Use the longitudinal screw to make the pressure roller press against the inside of the bend to complete the positioning of the bend.

[0020] Fine-tuning positioning with the tapping drill bit: After the base plate and the tapping workbench are installed, the vertical plane where the center line of the two-way distance meter is located intersects perpendicularly with the vertical plane where the side end face of the second baffle is located, which is the position of the tapping drill bit axis. At this time, the distance of the first distance meter is G; move the horizontal adjustment rod until the spacing on both sides of the two-way distance meter is equal. The spacing between the two index plates is c, cab = D, D is the diameter of the elbow, the radius of the elbow is R, the distance of the first distance meter is s, and the vertical distance from the side end face of the second baffle to the inner end face of the baffle is L. Adjust the longitudinal adjustment rod so that s is the same as G. At this time, the distance of the second distance meter is H. Adjust the longitudinal adjustment rod again so that the distance of the second distance meter is HLR, completing the positioning of the vertical part of the elbow and the tapping drill bit axis.

[0021] Positioning the other end of the bent pipe: Rotate the two sets of levers so that the first baffle and the second baffle rotate the bending angle value at the same time, use the locking screw to position the lever position, and complete the positioning of the other end of the bent pipe and the tapping drill bit.

[0022] The present invention has at least the following beneficial effects:

[0023] 1. By limiting the angular positions of the fixed and movable clamping plates according to the specific angle of the bent pipe, precise clamping of the bent pipe can be achieved. By setting a two-way distance meter, a first distance meter, and a second distance meter to measure the distance, the axis line of the bent pipe and the axis line of the tapping drill bit can be accurately positioned. By rotating the bent pipe, the two ends of the bent pipe and the tapping drill bit can be automatically positioned, and the tapping positioning of the bent pipe is efficient.

[0024] 2. Through the combination of the distance meter and the control box, the precise fine-tuning positioning of elbows with different outer diameters can be achieved by calculating the distance. When the outer diameter of the elbow is unknown, the outer diameter of the precision elbow can be known; when the outer diameter of the elbow is known, the self-test fixture can be calibrated, or the outer diameter of the elbow can be tested to see if it is qualified, making the fixture multifunctional. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 This is a schematic diagram of the left side of the precision fixture;

[0027] Figure 2 This is a schematic diagram of the right side of the precision fixture;

[0028] Figure 3 This is a schematic diagram of the splitting of the clamping mechanism and the fine-tuning positioning mechanism;

[0029] Figure 4 Installation diagram for fine-tuning the positioning mechanism and information collection mechanism;

[0030] Figure 5 This is a schematic diagram of the left side of the precision fixture;

[0031] Figure 6 This is a schematic diagram of the right side of the precision fixture;

[0032] Figure 7 Schematic diagram of the movable clamp and fixed clamp clamping the 45° elbow.

[0033] In the figure: 1, clamping mechanism; 101, first baffle; 102, second baffle; 103, hexagonal column; 104, fixed seat; 105, positioning hole; 106, shift lever; 107, locking screw; 108, stop screw; 109, positioning screw sleeve; 110, positioning shaft; 111, movable clamping plate; 112, baffle seat; 113, fixed clamping plate; 114, baffle bar; 115, screw seat; 116, slide groove; 117, longitudinal screw; 118 , pressure roller; 119, positioning cap; 120, slide; 2, fine-tuning positioning mechanism; 201, base plate; 202, fine-tuning seat; 203, transverse adjustment rod; 204, transverse side plate; 205, longitudinal side plate; 206, longitudinal adjustment rod; 207, movable hole; 3, information collection mechanism; 301, control box; 302, bracket; 303, first rangefinder; 304, second rangefinder; 305, guide plate; 306, two-way rangefinder. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0035] Example 1

[0036] Reference Figure 1-7 , a controllable fine-tuning precision fixture, comprising:

[0037] The clamping mechanism 1 includes: a first baffle 101, a second baffle 102, a fixed clamping plate 113 and a movable clamping plate 111. The outer sides of the first baffle 101 and the second baffle 102 are respectively provided with a fixed seat 104, and the first baffle 101 and the second baffle 102 are connected by a positioning shaft 110. The first baffle 101 and the second baffle 102 are limited and rotated with the fixed seat 104, and the axis of rotation is collinear with the axis of the positioning shaft 110. The bottom ends of the fixed clamping plate 113 and the movable clamping plate 111 are respectively slidably sleeved on the positioning shaft 110, and a baffle 114 is fixedly installed between the first baffle 101 and the second baffle 102. The center line of the fixed clamping plate 113 is in a vertical state, and the fixed clamping plate 113 slides with the baffle 114. The movable through-fit is matched, and a block seat 112 is fitted between the first baffle 101 and the second baffle 102. The block seat 112 fits with the outer side of the movable clamping plate 111, and the block seat 112 is installed with an insertion rod that passes through the movable clamping plate 111. The movable clamping plate 111 is arranged on a side close to the first baffle 101, and the side end surface of the movable clamping plate 111 close to the second baffle 102 is located on the same vertical plane as the side end surface of the fixed clamping plate 113. The movable clamping plate 111 is limited and rotated with the first baffle 101. A positioning screw 108 that abuts against the movable clamping plate 111 is installed on the first baffle 101. A pressure roller 118 is provided between the first baffle 101 and the second baffle 102, and the pressure roller 118 and the second baffle 102 are detachably installed in the vertical direction;

[0038] The information collection mechanism 3 includes a control box 301 and a bracket 302. A two-way rangefinder 306 is mounted on the top of the bracket 302. A first rangefinder 303 and a second rangefinder 304 are mounted in the middle of the bracket 302, both of which are not aligned on the same vertical line. The first rangefinder 303, the second rangefinder 304, and the two-way rangefinder 306 are electrically connected to the control box 301. The outer sides of the second baffle 102 and the fixed clamping plate 113 are respectively connected to index plates 305. The first rangefinder 303 and the second rangefinder 304 are respectively oriented toward the clamping mechanism 1.

[0039] The fine-tuning positioning mechanism 2 includes a base plate 201, a fine-tuning seat 202 provided on the base plate 201, a lateral adjustment rod 203 provided laterally above the base plate 201 for driving the fine-tuning seat 202 to adjust laterally relative to the base plate 201, and longitudinal adjustment rods 206 provided longitudinally above the base plate 201 for driving the fine-tuning seat 202 to adjust longitudinally relative to the base plate 201. The fixing seat 104 is mounted on the fine-tuning seat 202, and the bracket 302 and the control box 301 are mounted on the base plate 201.

[0040] In the embodiment: in the initial state, the center line of the fixed clamping plate 113 is parallel to the vertical center line, so that no matter how many angles the bent pipe is, one end of the bent pipe is vertically positioned under the limit of the fixed clamping plate 113, and the angle between the movable clamping plate 111 and the fixed clamping plate 113 is the same as the angle of the bent pipe. The positioning screw 108 pushes the movable clamping plate 111 to move toward the fixed clamping plate 113, so that the bent pipe is clamped between the second baffle 102, the movable clamping plate 111 and the fixed clamping plate 113. In addition, by moving the pressure roller 118 downward to abut against the inner side of the bent pipe, the movement of the bent pipe is limited, so that the outer side of the bent pipe is respectively abutted against the stop bar 114 and the stop seat 112, which can be used for bent pipes of different outer diameters within a range of 90°. The clamp has a wide range of applications and good versatility. At the same time, a scale line can be set on the first baffle 101. It is used for self-detection of angle clamping, thereby achieving precise positioning of precision pipe bends; a PLC mainboard is installed in the control box 301, which is used to receive and process the numerical values of the two-way rangefinder 306, the first rangefinder 303 and the second rangefinder 304, and is also used to process and calculate the distance that the horizontal adjustment rod 203 and the longitudinal adjustment rod 206 need to move, so as to achieve the effect of precise positioning of the axis line of the bend and the axis line of the tapping drill bit; at the same time, when the tapping of the first end of the bend is completed, the first baffle 101 and the second baffle 102 are directly rotated to the bend angle value, which can achieve the effect of rapid and automatic positioning of the axis line of the second end of the bend and the axis line of the tapping drill bit. Compared with the existing tapping processing at both ends of the bend, the tapping processing error is small, more precise, and the tapping processing at both ends of the bend is more efficient.

[0041] In one embodiment, a movable hole 207 is opened in the fine-tuning seat 202, and the transverse adjustment rod 203 passes through the movable hole 207. Two rings are sleeved on the transverse adjustment rod 203, and the two rings are fitted with two sides of the fine-tuning seat 202. The outer diameter of the ring is larger than the height of the movable hole 207. Transverse side plates 204 are respectively installed on the transverse sides of the base plate 201, and the extending end of the transverse adjustment rod 203 is screwed and connected with the corresponding transverse side plates 204. Specifically, when the longitudinal adjustment rod 206 adjusts the longitudinal position of the fine-tuning seat 202, the position of the transverse adjustment rod 203 remains unchanged, and the movable hole 207 can limit the movable cooperation between the fine-tuning seat 202 and the transverse adjustment rod 203. The setting of the ring of the transverse adjustment rod 203 can limit the linear adjustment of the fine-tuning seat 202 to prevent the fine-tuning seat 202 from tilting.

[0042] In one embodiment, two longitudinal side plates 205 are respectively installed on the longitudinal sides of the base plate 201, and the longitudinal adjustment rods 206 are screwed through the corresponding longitudinal side plates 205. The extended ends of the longitudinal adjustment rods 206 are abutted against the side end surfaces of the fine-tuning seat 202. Specifically, four groups of longitudinal adjustment rods 206 are abutted against the fine-tuning seat 202, and the progress of the position adjustment of the fine-tuning seat 202 can be judged by observing the vertical changes of the rangefinder.

[0043] In one embodiment, the inner side of the index plate 305 connected to the fixed clamping plate 113 is spaced apart from the inner side of the fixed clamping plate 113 by a; the inner side of the index plate 305 connected to the second baffle 102 is spaced apart from the inner side of the second baffle 102 by b, a and b are equal, the inner side of the fixed clamping plate 113 and the inner side of the second baffle 102 are respectively the workpiece clamping sides. Specifically, by utilizing the setting of the index plate 305, the distance between the fixed clamping plate 113 and the second baffle 102 is magnified, and the outer diameter of the precision bent pipe can be known through the two-way distance meter 306 when the outer diameter of the bent pipe is unknown; when the outer diameter of the bent pipe is known, the self-inspection fixture can be calibrated, or the outer diameter of the bent pipe can be detected to see whether it is qualified, so that the fixture can be used for multiple purposes.

[0044] In one embodiment, when the two-way rangefinder 306 is located in the middle position of the two index plates 305, the first rangefinder 303 is opposite to the side end surface of the second baffle 102, and the ranging port of the second rangefinder 304 is located on the central vertical plane of the two-way rangefinder 306, and the central vertical plane is parallel to the second baffle 102. Specifically, the position of the two-way rangefinder 306 is used to determine the longitudinal position of the axis of the tapping drill bit, and the first rangefinder 303 is used to drive the lateral position of the axis of the tapping drill bit, and then the vertical position of the two-way rangefinder 306 is used to move the bent pipe to the position of the tapping drill bit for positioning.

[0045] In one embodiment, the first baffle 101 and the second baffle 102 are respectively a quarter fan-shaped structure, and a plurality of positioning screw sleeves 109 are installed in an arc array on the first baffle 101, and the positioning screw 108 is threadedly connected to the positioning screw sleeve 109, and a positioning cap 119 is installed on the movable clamping plate 111, and the extended end of the positioning screw 108 is plugged into the positioning cap 119. Specifically, the plurality of positioning screw sleeves 109 can be used to position the movable clamping plate 111 at the second end of the bent pipe at different angles, such as a 30° bend, a 45° bend and a 90° bend. The positioning screw 108 is abutted against the positioning cap 119 to push the movable clamping plate 111 along the positioning axis 110 toward the second baffle 102 until it abuts against the bent pipe.

[0046] In one embodiment, a slide groove 116 is vertically opened on the top of the second baffle 102, and a screw seat 115 is fixedly installed on the outer bottom of the slide groove 116. A slide seat 120 is slidably arranged in the slide groove 116, and a longitudinal screw 117 is screwed through the inner thread of the slide seat 120. The bottom end of the longitudinal screw 117 is screwed through and connected to the screw seat 115, and the pressure roller 118 is fixedly connected to the slide seat 120. Specifically, when the bent pipe is clamped, the slide seat 120 is slid into the slide groove 116, and the longitudinal screw 117 is used to be threaded through and connected to the screw seat 115, so that the pressure roller 118 moves downward until it is against any inner side of the bent pipe. At this time, the two sides of the bent pipe are stably positioned against the baffle 114 and the baffle seat 112 under the drive of the pressure roller 118.

[0047] In one embodiment, the outer end faces of the first baffle 101 and the second baffle 102 have hexagonal holes at their axis centers, and threaded circular holes at their inner end faces. A plurality of positioning holes 105 are provided in an arc-shaped array on the fixing seat 104. A lever 106 is provided on the outer side of the fixing seat 104. A cylindrical block and a hexagonal column 103 are coaxially provided on the inner side of the bottom end of the lever 106. The hexagonal column 103 is plugged into the hexagonal hole, and the cylindrical block is movably fitted with the fixing seat 104. A locking screw 107 is used to thread the top of the lever 106 and connect it to the corresponding positioning hole 105. Specifically, by rotating the lever 106, the corresponding first baffle 101 or the second baffle 102 rotates together. For example, when the second end of the 45° elbow starts to be tapped, after rotating the lever 106 to 45°, the locking screw 107 is used to position the lever 106 and the fixing seat 104 to achieve rotational positioning of the first baffle 101 and the second baffle 102.

[0048] Example 2

[0049] Reference Figure 1-7 A method for controllable fine-tuning workpiece clamping includes a precision fixture of embodiment 1, wherein the clamping includes:

[0050] Bend clamping and positioning: Determine the angle of the bend, limit the rotation of the movable clamping plate 111, and make the angle between the movable clamping plate 111 and the fixed clamping plate 113 the same as the angle of the bend. Place the bend between the movable clamping plate 111 and the fixed clamping plate 113, and use the positioning screw 108 to clamp the bend between the second baffle 102, the fixed clamping plate 113, the movable clamping plate 111, the baffle 114 and the baffle seat 112. Use the longitudinal screw 117 to make the pressure roller 118 press against the inside of the bend to complete the positioning of the bend.

[0051] Fine-tuning positioning of the tapping drill bit: After the base plate 201 is installed on the tapping workbench, the vertical plane where the center line of the two-way distance meter 306 is located intersects perpendicularly with the vertical plane where the side end surface of the second baffle 102 is located, which is the position of the axis line of the tapping drill bit. At this time, the distance of the first distance meter 303 is G; move the lateral adjustment rod 203 until the spacing between the two sides of the two-way distance meter 306 is equal, the spacing between the two index plates 305 is c, cab = D, D is the diameter of the bend, the radius of the bend is R, the distance between the first distance meter 303 is s, and the side end surface of the second baffle 102 to the baffle bar 11 is s. The vertical distance between the inner end face and the tapping drill bit is L. The longitudinal adjustment rod 206 is adjusted so that s and G are equal. At this time, the distance of the second rangefinder 304 is H. The longitudinal adjustment rod 206 is adjusted again so that the distance of the second rangefinder 304 is HLR. The positioning of the vertical portion of the elbow and the axis of the tapping drill bit is completed. The control box 301 is provided with a PLC mainboard and a display screen. The PLC mainboard is used to receive and process measurement data from the bidirectional rangefinder 306, the first rangefinder 303, and the second rangefinder 304, and is used to calculate the distance that the second rangefinder 304 needs to move according to the installed calculation module.

[0052] Positioning the other end of the bend: Rotate the two sets of levers 106 so that the first baffle 101 and the second baffle 102 rotate the bend angle value at the same time, and use the locking screw 107 to position the lever 106 to complete the positioning of the other end of the bend and the tapping drill bit;

[0053] To sum up, by installing the base plate 201 of the fixture on the tapping workbench, accurate clamping and positioning of bent pipes at different angles can be achieved, accurate fine-tuning positioning of the bent pipe and the tapping drill bit can be achieved, and rapid tapping positioning of the second end of the bent pipe can be achieved, thereby realizing a precision fixture for bent pipes that is easy to use, has accurate positioning, good functionality, good applicability, and efficient tapping positioning.

[0054] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions merely illustrate the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A controllable fine-tuning precision fixture, characterized in that: include: The clamping mechanism (1) comprises: a first baffle (101), a second baffle (102), a fixed clamping plate (113) and a movable clamping plate (111), wherein the outer sides of the first baffle (101) and the second baffle (102) are respectively provided with a fixed seat (104), the first baffle (101) and the second baffle (102) are connected by a positioning shaft (110), the first baffle (101) and the second baffle (102) are limitedly rotated with the fixed seat (104), and the axis of rotation is collinear with the axis of the positioning shaft (110), the bottom ends of the fixed clamping plate (113) and the movable clamping plate (111) are respectively slidably sleeved on the positioning shaft (110), a baffle (114) is fixedly installed between the first baffle (101) and the second baffle (102), the center line of the fixed clamping plate (113) is in a vertical state, and the fixed clamping plate (113) and the baffle (111) are in a vertical state. 4) Sliding through fit, a block seat (112) is provided between the first baffle (101) and the second baffle (102), the block seat (112) is fitted with the outer side of the movable clamping plate (111), the block seat (112) is installed with an insert rod that penetrates the movable clamping plate (111), the movable clamping plate (111) is provided on a side close to the first baffle (101), and the side end face of the movable clamping plate (111) close to the second baffle (102) is in contact with the fixed clamping plate ( The side end surfaces of the movable clamping plate (111) and the first baffle (101) are located on the same vertical plane, the movable clamping plate (111) and the first baffle (101) are limitedly rotated, the first baffle (101) is provided with a retaining screw (108) that abuts against the movable clamping plate (111), a pressure roller (118) is provided between the first baffle (101) and the second baffle (102), and the pressure roller (118) and the second baffle (102) are detachably installed in the vertical direction; An information collection mechanism (3) comprises a control box (301) and a bracket (302), wherein a bidirectional rangefinder (306) is mounted on the top of the bracket (302), and a first rangefinder (303) and a second rangefinder (304) which are not on the same vertical line are mounted in the middle of the bracket (302), wherein the first rangefinder (303), the second rangefinder (304) and the bidirectional rangefinder (306) are electrically connected to the control box (301), respectively, and an index plate (305) is connected to the outer side of the second baffle (102) and the fixed clamping plate (113), respectively, and the first rangefinder (303) and the second rangefinder (304) are respectively oriented toward the clamping mechanism (1); The fine-tuning positioning mechanism (2) comprises a base plate (201), a fine-tuning seat (202) provided on the base plate (201), a transverse adjustment rod (203) provided transversely above the base plate (201) for driving the fine-tuning seat (202) to adjust transversely based on the base plate (201), longitudinal adjustment rods (206) provided longitudinally above the base plate (201) for driving the fine-tuning seat (202) to adjust longitudinally based on the base plate (201), the fixing seat (104) being mounted on the fine-tuning seat (202), and the bracket (302) and the control box (301) being mounted on the base plate (201).

2. A controllable fine-tuning precision fixture according to claim 1, characterized in that: A movable hole (207) is provided in the fine-tuning seat (202), and the transverse adjustment rod (203) passes through the movable hole (207). Two collars are sleeved on the transverse adjustment rod (203), and the two collars are fitted with two sides of the fine-tuning seat (202). The outer diameter of the collar is greater than the height of the movable hole (207). Transverse side plates (204) are respectively installed on the transverse sides of the base plate (201), and the extended end of the transverse adjustment rod (203) is screwed and connected with the corresponding transverse side plate (204) through a thread.

3. The controllable fine-tuning precision fixture according to claim 1, characterized in that: Two longitudinal side plates (205) are respectively installed on both longitudinal sides of the base plate (201); the longitudinal adjustment rod (206) is screwed through the corresponding longitudinal side plates (205); and the extended end of the longitudinal adjustment rod (206) abuts against the side end surface of the fine-tuning seat (202).

4. The controllable fine-tuning precision fixture according to claim 1, characterized in that: The inner side of the index plate (305) connected to the fixed clamping plate (113) is spaced apart from the inner side of the fixed clamping plate (113) by a distance a; the inner side of the index plate (305) connected to the second baffle (102) is spaced apart from the inner side of the second baffle (102) by a distance b, a and b are equal, and the inner side of the fixed clamping plate (113) and the inner side of the second baffle (102) are respectively the workpiece clamping sides.

5. The controllable fine-tuning precision fixture according to claim 1, characterized in that: When the two-way rangefinder (306) is located in the middle of the two index plates (305), the first rangefinder (303) is opposite to the side end surface of the second baffle (102), and the ranging port of the second rangefinder (304) is located on the central vertical plane of the two-way rangefinder (306), and the central vertical plane is parallel to the second baffle (102).

6. The controllable fine-tuning precision fixture according to claim 1, characterized in that: The first baffle (101) and the second baffle (102) are respectively a quarter-fan-shaped structure, a plurality of positioning screw sleeves (109) are installed in an arc-shaped array on the first baffle (101), the retaining screw (108) is threadedly connected to the positioning screw sleeve (109), a positioning cap (119) is installed on the movable clamping plate (111), and the extending end of the retaining screw (108) is plugged into the positioning cap (119).

7. The controllable fine-tuning precision fixture according to claim 1, characterized in that: A slide groove (116) is vertically provided on the top of the second baffle (102), a screw seat (115) is fixedly installed on the outer bottom of the slide groove (116), a slide seat (120) is slidably provided in the slide groove (116), a longitudinal screw rod (117) is screwed through the inner thread of the slide seat (120), and the bottom end of the longitudinal screw rod (117) is screwed and connected with the screw seat (115) through a thread, and the pressure roller (118) is fixedly connected to the slide seat (120).

8. The controllable fine-tuning precision fixture according to claim 1, characterized in that: The outer end faces of the first baffle (101) and the second baffle (102) have hexagonal holes at their axis centers, and threaded circular holes at their inner end faces. The fixing seat (104) is provided with a plurality of positioning holes (105) in an arc-shaped array. A shift rod (106) is provided on the outer side of the fixing seat (104). A cylindrical block and a hexagonal column (103) are coaxially provided on the inner side of the bottom end of the shift rod (106). The hexagonal column (103) is plugged into the hexagonal hole, and the cylindrical block is movably matched with the fixing seat (104). The top of the shift rod (106) is threadedly connected to the corresponding positioning hole (105) using a locking screw (107).

9. A controllable fine-tuning workpiece clamping method, comprising the precision fixture according to any one of claims 1 to 8, characterized in that: Clamping includes: Bend pipe clamping and positioning: determine the angle of the bend pipe, limit the rotation of the movable clamping plate (111), and make the angle between the movable clamping plate (111) and the fixed clamping plate (113) the same as the angle of the bend pipe, place the bend pipe in the movable clamping plate (111) and the fixed clamping plate (113), use the positioning screw (108) to clamp the bend pipe between the second baffle (102), the fixed clamping plate (113), the movable clamping plate (111), the baffle (114) and the baffle seat (112), and use the longitudinal screw (117) to make the pressure roller (118) press against the inner side of the bend pipe to complete the positioning of the bend pipe; Fine-tuning positioning with the tapping drill bit: After the base plate (201) and the tapping workbench are installed, the vertical plane where the center line of the two-way distance meter (306) is located intersects perpendicularly with the vertical plane where the side end surface of the second baffle (102) is located, which is the position where the axis line of the tapping drill bit is located. At this time, the distance of the first distance meter (303) is G; the horizontal adjustment rod (203) is moved until the distances on both sides of the two-way distance meter (306) are equal, and the distances between the two index plates (305) are c, ca b=D, D is the diameter of the bend, the radius of the bend is R, the distance of the first distance meter (303) is s, the vertical distance from the side end face of the second baffle (102) to the inner end face of the baffle bar (114) is L, the longitudinal adjustment rod (206) is adjusted so that s is equal to G, at which time the distance of the second distance meter (304) is H, the longitudinal adjustment rod (206) is adjusted again so that the distance of the second distance meter (304) is HLR, and the positioning of the vertical portion of the bend and the axis of the tapping drill bit is completed; Positioning the other end of the bend: rotating the two sets of shifting rods (106) so that the first baffle (101) and the second baffle (102) rotate the bend angle value at the same time, and using the locking screw (107) to position the shifting rod (106) to complete the positioning of the other end of the bend and the tapping drill bit.

10. A controllable fine-tuning workpiece clamping method according to claim 9, characterized in that: A PLC mainboard and a display screen are provided in the control box (301). The PLC mainboard is used to receive and process measurement data from the bidirectional rangefinder (306), the first rangefinder (303) and the second rangefinder (304), and to calculate the distance that the second rangefinder (304) needs to move according to a loaded calculation module.

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