阅读说明：本技术 智能差动对刀校靠计算尺 (Intelligent differential tool setting and leaning-correcting slide rule ) 是由 钱微 杨倩 霍陆昱 张莲 于 2019-10-15 设计创作，主要内容包括：本发明公开了智能差动对刀校靠计算尺,包括竖直基板、水平基板、梯形固定板、梯形动板、dsPIC33EP芯片和显示屏；梯形固定板和梯形动板的斜腰与其对应的下底形成夹角α,竖直基板上镶嵌倾斜设置的电阻尺Ⅰ和电阻尺Ⅱ,梯形动板上设置有电极Ⅰ和电极Ⅱ,电阻尺Ⅰ的两端、电阻尺Ⅱ的两端、电极Ⅰ和电极Ⅱ构成全桥差动电路。本发明构建了利用这个结构计算出仿形靠尺与垂直木板边缘的最佳位置关系,并将位置关系以梯形动板与竖直基板的位置关系表达；通过水平基板与梯形动板的关系可以方便地确定加工深度尺寸、高度尺寸；通过作业顺序保证仿形靠尺、刀具的定位精度、加工深度等尺寸高于现有工具的定位精度,并且大大简化了计算和作业方式,提高了操作效率。(The invention discloses an intelligent differential tool setting and leaning-correcting slide rule, which comprises a vertical base plate, a horizontal base plate, a trapezoidal fixed plate, a trapezoidal movable plate, a dsPIC33EP chip and a display screen, wherein the vertical base plate is arranged on the upper portion of the horizontal base plate; the inclined waist of trapezoidal fixed plate and trapezoidal movable plate forms contained angle alpha rather than going to the bottom that corresponds, inlays resistance ruler I and resistance ruler II that the slope set up on the vertical base plate, is provided with electrode I and electrode II on the trapezoidal movable plate, and resistance ruler I's both ends, resistance ruler II's both ends, electrode I and electrode II constitute full-bridge differential circuit. The invention constructs the optimal position relation between the profiling guiding rule and the edge of the vertical wood board by utilizing the structure, and expresses the position relation by the position relation between the trapezoidal movable plate and the vertical base plate; the processing depth size and the height size can be conveniently determined through the relationship between the horizontal base plate and the trapezoidal movable plate; the positioning accuracy of the copying running rule and the positioning accuracy of the cutter, the processing depth and other dimensions are higher than those of the existing tool through the operation sequence, the calculation and operation modes are greatly simplified, and the operation efficiency is improved.)

1. Differential tool setting of intelligence is leaned on slide rule, its characterized in that: the device comprises a vertical substrate (1), a horizontal substrate (2), a trapezoidal fixed plate (3), a trapezoidal movable plate (4), a dsPIC33EP chip (5) and a display screen (6);

a resistance ruler I (7) and a resistance ruler II (8) which are obliquely arranged are embedded on the vertical substrate (1), wherein the resistance ruler I (7) and the resistance ruler II (8) are parallel to each other and form an included angle alpha with the horizontal plane at the bottom;

the horizontal base plate (2) is fixedly arranged at the top of the vertical base plate (1) and is vertical to the vertical base plate (1), and two ends of the horizontal base plate (2) extend out of the top end of the vertical base plate (1); a notch (9) is arranged on the horizontal substrate (2);

the trapezoidal fixing plate (3) is vertically arranged and fixed on the vertical base plate (1), the trapezoidal fixing plate (3) is a right-angled trapezoid with a large upper part and a small lower part, and an inclined waist of the trapezoidal fixing plate (3) forms an included angle alpha with a lower bottom; the top surface of the trapezoidal fixing plate (3) and the top surface of the vertical substrate (1) are on the same plane with the lower surface of the horizontal substrate (2);

the trapezoidal movable plate (4) is vertically arranged on the vertical base plate (1), the trapezoidal movable plate (4) is a right-angled trapezoid with a small upper part and a large lower part, and an inclined waist of the trapezoidal movable plate (4) forms an included angle alpha with the lower bottom; the inclined waist of the trapezoidal movable plate (4) is close to the inclined waist of the trapezoidal fixed plate (3) and can slide on the vertical base plate (1) along the inclined waist of the trapezoidal fixed plate (3); an electrode I (10) and an electrode II (11) are arranged on the trapezoidal movable plate (4), the electrode I (10) corresponds to the resistance ruler I (7), and the electrode II (11) corresponds to the resistance ruler II (8); one side, close to the straight waist, of the top end of the trapezoidal movable plate (4) corresponds to the notch (9), and the length of the top end of the trapezoidal movable plate (4) is larger than that of the notch (9); when the trapezoidal movable plate (4) slides to the uppermost end, the top end surface of the trapezoidal movable plate (4) and the bottom surface of the horizontal base plate (2) are on the same plane, and the straight waist of the trapezoidal movable plate (4) extends out of the end surface of the corresponding vertical base plate (1);

the upper end f1 of the resistance ruler I (7) and the lower end f4 of the resistance ruler II (8) are respectively connected with a power supply, and the lower end f3 of the resistance ruler I (7) and the upper end f2 of the resistance ruler II (8) are grounded; two ends f1 and f3 of the resistance ruler I (7), two ends f2 and f4 of the resistance ruler II (8), and the electrode I (10) and the electrode II (11) form a full-bridge differential circuit;

the voltage signal V1 and the voltage signal V2 collected by the electrode I (10) and the electrode II (11) are input into a dsPIC33EP chip (5), the voltage signal is converted into the vertical moving position height of the trapezoidal movable plate (4) by the dsPIC33EP chip (5) through an A/D sampling module of the dsPIC33EP chip, the position height is the tenon processing height h, and then the edge difference l between the right-angle waist edge of the trapezoidal movable plate (4) and the vertical substrate (1) is calculated by the following formula:

l＝(R_z-R_d+h cotα)

wherein l is the edge difference between the right-angled waist edge of the trapezoidal movable plate (4) and the vertical base plate (1), R_zIs the bearing radius of the tool, R_dThe radius of the cutting edge at the end part of the cutter, and alpha is the included angle between the cutting edge and the bottom edge of the section of the cutter; determining profile running rule and verticality from edge difference lThe optimal position of the edges of the wood board;

and the tenon machining height h and the edge difference l are both sent to a display screen (6) through SPI bus communication.

2. The intelligent differential tool setting calibration slide rule according to claim 1, wherein: the top end of the vertical base plate (1) is provided with a convex clamping block (12), the horizontal base plate (2) is provided with a clamping hole (13) matched with the clamping block (12), and the clamping block (12) on the vertical base plate (1) is clamped into the clamping hole (13) of the horizontal base plate (2).

3. The intelligent differential tool setting calibration slide rule according to claim 1, wherein: a positioning mounting hole I (14) and a positioning pin hole I (15) are formed in the vertical base plate (1), and a positioning mounting hole II (16) and a positioning pin hole II (17) are formed in the trapezoidal fixing plate (3); the locating pin (18) passes through locating pin hole I (15) and locating pin hole II (17), and locking screw (19) pass through locating mounting hole I (14) and locating mounting hole II (16), trapezoidal fixed plate (3) pass through locking screw (19) fixed connection on vertical base plate (1).

4. The intelligent differential tool setting calibration slide rule according to claim 1, wherein: the vertical base plate (1) is provided with a positioning rod (20), the trapezoidal movable plate (4) is provided with a sliding groove (21) parallel to the oblique waist of the trapezoidal fixed plate (3), and the positioning rod (20) penetrates through the sliding groove (21) and is in sliding fit with the sliding groove (21).

5. An intelligent differential tool setting calibration slide rule according to any one of claims 1 to 4, wherein: still include zero point and range correction module, zero point and range correction module includes button K1, resistance R7, electric capacity C16 and resistance R10, button K1's one end contact ground connection, button K1's another termination point is connected with resistance R7's one end, resistance R7's the other end is connected with the power, electric capacity C16 and resistance R10's one end all are connected with resistance R7's one end, electric capacity C16's the other end ground connection, resistance R10's the other end is connected with dsPIC33EP chip (5).

6. An intelligent differential tool setting calibration slide rule according to any one of claims 1 to 4, wherein: the material information calling module comprises a button K2, a resistor R8, a capacitor C17 and a resistor R11, one end contact of the button K2 is grounded, the other end contact of the button K2 is connected with one end of a resistor R8, the other end of the resistor R8 is connected with a power supply, one ends of the capacitor C17 and the resistor R11 are connected with one end of the resistor R8, the other end of the capacitor C17 is grounded, and the other end of the resistor R11 is connected with a dsPIC33EP chip (5).

7. An intelligent differential tool setting calibration slide rule according to any one of claims 1 to 4, wherein: the current operation confirmation module comprises a button K3, a resistor R9, a capacitor C18 and a resistor R12, wherein one end contact of the button K3 is grounded, the other end contact of the button K3 is connected with one end of a resistor R9, the other end of the resistor R9 is connected with a power supply, one ends of the capacitor C18 and the resistor R12 are connected with one end of the resistor R9, the other end of the capacitor C18 is grounded, and the other end of the resistor R12 is connected with a dsPIC33EP chip (5).

Technical Field

The invention relates to a tool setting and leaning slide rule which can determine the optimal position relation between a copying slide rule and wood and the processing stroke length according to the processing height of a dovetail.

Background

The dovetail tenon machine is a matched electric wood milling machine, and dovetail tenon milling cutters are used for manufacturing small wood mortise and tenon equipment of dovetail mortise and tenon through milling. The equipment mainly comprises a base, a clamping device for two sets of wood boards in the horizontal and vertical directions, a profiling guiding rule and a fixing device, wherein the profiling guiding rule determines the size of a processing period. The width of the processed tenon is related to whether the tenon and the mortise have proper matching tightness. The processing depth of the tenon can utilize the whole thickness of the wood board and obtain the end face completely jointed with the mortise, so that the tenon has the best mechanical strength. The depth of the mortise is the depth of the tenon, and the mortise can be smoothly riveted under the condition. The dovetail tenon cutter mills the end parts of the tenon and the mortise to form a circular truncated cone side surface envelope surface, so that the processing height of the cutter can influence the height of the tenon; under the condition that the positions of the profiling guiding rule and the wood are not changed, the two sizes of the depth of the tenon and the width of the end part of the tenon can be influenced. The dovetail mortise and tenon joint features that the height, depth and width of the tenon and mortise are closely coupled. After the height of the cutter is determined, if the sizes of the profiling guiding rule and the edge of the wood are too large, the depth of the tenon is reduced in the milling operation, the depth is smaller than the thickness of the wood board, the mechanical strength of the tenon is affected, and the mortise outburst can occur after the tenon is assembled. If the size of the profiling guiding rule and the edge of the wood is too small, the milling operation cannot form a circular truncated cone side face on the end face of the tenon due to the limitation of the profiling guiding rule, and the tenon cannot be attached and connected with the end face of the mortise. Therefore, the position relation between the profiling guiding rule and the wood board is determined according to the processing height of the cutter, whether the processing depth of the tenon can effectively utilize the thickness of the wood board or not is determined, and the shape of the end face of the tenon is also determined. The optimum position relation between the copying guiding rule and the edge of the wood board is that the depth of the tenon is the thickness of the board, and the end face is the side face of the circular truncated cone. After the depth of the tenon is determined to be the optimal size of the board thickness, the processing depth of the mortise can be determined to be the thickness of the wood board, so that the maximum mechanical strength and the smooth mortise combination without convex and concave after the tenon and the mortise are assembled are obtained.

In order to obtain the optimal processing result by using the dovetail mortise and tenon machine, the solution of the mutual coupling size of the processing height, the tenon width, the profiling guiding rule position, the processing depth and the like must be solved. These calculations are also related to the tool size, the profiling master processing cycle. At present, no tool capable of integrating resolving, measuring, tool setting, calibrating and checking is available. The existing vernier caliper is a usable measuring tool, but the position relation between the edge of the wood board and the profiling guiding rule cannot be determined in measurement because the measuring point of the end part of the profiling guiding rule is in the shape of a circular arc which is not easy to determine. Even if the position relation can be measured, the position relation between the copying running rule and the edge of the wood board is difficult to adjust according to the measuring result due to the structure of the caliper. The shape of the end of the mortise is circular arc and has an included angle, and the accurate size cannot be obtained by using a vernier caliper to carry out depth measurement. Therefore, the optimal position relationship between the profiling guiding rule and the edge of the wood board is difficult to find, and multiple trial processing is generally carried out to adjust the position relationship between the profiling guiding rule and the edge of the wood board and the processing depth of the mortise so as to obtain a better processing effect.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides the intelligent differential tool setting and calibrating slide rule which can improve the mechanical strength of the riveting machine and the flatness after splicing, and solves the problems of calculation, measurement, tool setting, calibration and the like of resolving and determining the optimal position relation between the profiling slide rule and the wood edge according to the tenon machining height by utilizing the relative motion of the fixed rule and the movable rule with the same bevel angle as the dovetail tenon cutter, thereby improving the size precision of wood working machining.

In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:

the intelligent differential tool setting and leaning-correcting slide rule comprises a vertical base plate, a horizontal base plate, a trapezoidal fixed plate, a trapezoidal movable plate, a dsPIC33EP chip and a display screen;

the vertical substrate is embedded with a resistance ruler I and a resistance ruler II which are obliquely arranged, and the resistance ruler I and the resistance ruler II are parallel to each other and form an included angle alpha with the horizontal plane of the bottom;

the horizontal base plate is fixedly arranged at the top of the vertical base plate and is vertical to the vertical base plate, and two ends of the horizontal base plate extend out of the top end of the vertical base plate; a notch is arranged on the horizontal substrate;

the trapezoidal fixing plate is vertically arranged and fixed on the vertical base plate, the trapezoidal fixing plate is a right-angled trapezoid with a large upper part and a small lower part, and an inclined waist of the trapezoidal fixing plate and a lower bottom form an included angle alpha; the top surface of the trapezoidal fixing plate and the top surface of the vertical substrate are on the same plane with the lower surface of the horizontal substrate;

the trapezoidal movable plate is vertically arranged on the vertical base plate, the trapezoidal movable plate is a right-angled trapezoid with a small upper part and a large lower part, and an inclined waist of the trapezoidal movable plate and a lower bottom form an included angle alpha; the inclined waist of the trapezoidal movable plate is close to the inclined waist of the trapezoidal fixed plate and can slide on the vertical base plate along the inclined waist of the trapezoidal fixed plate; an electrode I and an electrode II are arranged on the trapezoidal movable plate, the electrode I corresponds to the resistance ruler I, and the electrode II corresponds to the resistance ruler II; one side, close to the straight waist, of the top end of the trapezoidal movable plate corresponds to the notch, and the length of the top end of the trapezoidal movable plate is larger than that of the notch; when the trapezoidal movable plate slides to the uppermost end, the top end surface of the trapezoidal movable plate and the bottom surface of the horizontal base plate are on the same plane, and the straight waist of the trapezoidal movable plate extends out of the end surface of the corresponding vertical base plate;

the upper end f1 of the resistance ruler I and the lower end f4 of the resistance ruler II are respectively connected with a power supply, and the lower end f3 of the resistance ruler I and the upper end f2 of the resistance ruler II are grounded; two ends f1 and f3 of the resistance ruler I, two ends f2 and f4 of the resistance ruler II, the electrode I and the electrode II form a full-bridge differential circuit;

the voltage signal V1 and the voltage signal V2 collected by the electrode I and the electrode II are input into a dsPIC33EP chip, the voltage signal is converted into the vertical moving position height of the trapezoidal movable plate by the dsPIC33EP chip through an A/D sampling module of the dsPIC33EP chip, the position height is the tenon processing height h, and the edge difference l between the right-angle waist edge of the trapezoidal movable plate and the vertical substrate is calculated by the following formula:

l＝(R_z-R_d+hcotα)

wherein l is the edge difference between the right-angled waist edge of the trapezoidal movable plate and the vertical base plate,R_zis the bearing radius of the tool, R_dThe radius of the cutting edge at the end part of the cutter, and alpha is the included angle between the cutting edge and the bottom edge of the section of the cutter; determining the optimal position of the profiling guiding rule and the edge of the vertical wood board according to the edge difference l; and the tenon machining height h and the edge difference l are both transmitted to the display screen through SPI bus communication.

As a preferred scheme of the present invention, a protruding fixture block is disposed at the top end of the vertical substrate, a fixture hole matched with the fixture block is disposed on the horizontal substrate, and the fixture block on the vertical substrate is clamped into the fixture hole of the horizontal substrate.

As another preferred scheme of the invention, a positioning mounting hole I and a positioning pin hole I are arranged on the vertical substrate, and a positioning mounting hole II and a positioning pin hole II are arranged on the trapezoidal fixing plate; the locating pin passes locating pin hole I and locating pin hole II, and locking screw passes locating mounting hole I and locating mounting hole II, trapezoidal fixed plate passes through locking screw fixed connection on vertical base plate.

In still another preferred embodiment of the present invention, the vertical base plate is provided with a positioning rod, the trapezoidal movable plate is provided with a sliding groove parallel to the oblique waist of the trapezoidal fixed plate, and the positioning rod passes through the sliding groove and is slidably engaged with the sliding groove.

As an improved scheme of the invention, the intelligent differential tool setting leaning computing rule further comprises a zero point and range correcting module, the zero point and range correcting module comprises a button K1, a resistor R7, a capacitor C16 and a resistor R10, one end of the button K1 is grounded, the other end of the button K1 is connected with one end of a resistor R7, the other end of the resistor R7 is connected with a power supply, one ends of the capacitor C16 and the resistor R10 are both connected with one end of the resistor R7, the other end of the capacitor C16 is grounded, and the other end of the resistor R10 is connected with a dsPIC33EP chip.

As another improvement of the present invention, the intelligent differential tool setting slide rule further comprises a material information calling module, the material information calling module comprises a button K2, a resistor R8, a capacitor C17 and a resistor R11, one end of the button K2 is connected to ground, the other end of the button K2 is connected to one end of a resistor R8, the other end of the resistor R8 is connected to a power supply, one ends of the capacitor C17 and the resistor R11 are both connected to one end of the resistor R8, the other end of the capacitor C17 is connected to ground, and the other end of the resistor R11 is connected to the dsPIC33EP chip.

As a further improvement of the present invention, the intelligent differential tool setting slide rule further comprises a current operation confirmation module, the current operation confirmation module comprises a button K3, a resistor R9, a capacitor C18 and a resistor R12, one end of the button K3 is connected to ground, the other end of the button K3 is connected to one end of a resistor R9, the other end of the resistor R9 is connected to a power supply, one ends of the capacitor C18 and the resistor R12 are both connected to one end of the resistor R9, the other end of the capacitor C18 is connected to ground, and the other end of the resistor R12 is connected to the dsPIC33EP chip.

The invention has the following technical effects: the invention utilizes the included angle between the trapezoidal bevel edge and the bottom edge to be equal to the included angle between the cutting edge and the bottom edge of the section of the cutter, constructs the optimal position relationship between the profiling guiding rule and the edge of the vertical wood board by utilizing the structure, and expresses the position relationship by the position relationship between the trapezoidal movable plate and the vertical base plate, and considers that the used surface is tangent to the cylindrical surface in the geometric shape, thereby avoiding the problem of difficult determination of the optimal measuring point; the positioning accuracy of the profiling guiding rule and the cutter, the processing depth and other dimensions can be higher than those of the existing tool through a certain operation sequence, and the functions of voltage sampling, data processing, result output, error correction and the like are completed by adopting a digital circuit, so that the calculation and operation modes are greatly simplified, and the operation efficiency is improved.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of an intelligent differential tool setting calibration slide rule;

FIG. 2 is a schematic structural view of a vertical substrate;

FIG. 3 is a schematic view of a horizontal substrate;

FIG. 4 is a diagram showing the positional relationship among a vertical plank, a horizontal plank, a profiling guiding rule, a cutter and a cutter bearing;

FIG. 5 is a schematic structural view of a trapezoidal fixing plate;

FIG. 6 is a schematic structural view of a trapezoidal movable plate;

FIG. 7 is a schematic diagram of a full bridge differential circuit sampling;

FIG. 8 is a circuit schematic of a signal processing dsPIC33EP chip and display screen;

FIG. 9 is a circuit schematic of the zero and span calibration module;

FIG. 10 is a schematic circuit diagram of a material information call module;

FIG. 11 is a circuit schematic of a current operation confirmation module;

FIG. 12 is a schematic diagram of a power supply circuit;

FIG. 13 is a schematic view of a profiling guiding rule processing space;

FIG. 14 is a view of a dovetail mortise cutter configuration and parameters;

FIG. 15 is a schematic view of dovetail mortise machining depth correction;

FIG. 16 is a schematic view of calculation of the dovetail cutter machining height and the optimum position of the profiling guiding rule;

FIG. 17 is an enlarged view of a portion of FIG. 10;

FIG. 18 is a schematic view of the correction of the optimum position of the profiling guiding rule.

In the figure: 1-a vertical substrate; 2-a horizontal base plate; 3, a trapezoidal fixing plate; 4, a trapezoidal movable plate; 5-dsPIC 33EP chips; 6, a display screen; 7-resistance ruler I; 8-resistance ruler II; 9-a notch; 10-electrode I; 11-electrode ii; 12, clamping blocks; 13-a hole; 14, positioning a mounting hole I; 15-positioning pin hole I; 16-positioning a mounting hole II; 17-positioning pin hole II; 18-a positioning pin; 19-locking screw; 20-positioning rod; 21-a chute; 22-vertical wood board; 23-horizontal wooden board; 24-a cutter; 25-profiling guiding rule; 26-a cutter bearing; 27-a threaded hole; 28-a wood milling machine travel limiter; 29-mounting groove I; 30-mounting groove II.

Detailed Description

The technical solution of the present invention is further explained with reference to the drawings and the embodiments.

As shown in FIG. 1, the intelligent differential tool setting and leaning slide rule comprises a vertical base plate 1, a horizontal base plate 2, a trapezoidal fixed plate 3, a trapezoidal movable plate 4, a dsPIC33EP chip 5 and a display screen 6.

As shown in fig. 2 and fig. 3, a resistance ruler i 7 and a resistance ruler ii 8 which are obliquely arranged are embedded on the vertical substrate 1, and the resistance ruler i 7 and the resistance ruler ii 8 are parallel to each other and form an included angle α with the bottom horizontal plane. The top of vertical base plate 1 sets up a bellied fixture block 12, sets up one on the horizontal base plate 2 with fixture block 12 complex card hole 13, in fixture block 12 card on the vertical base plate 1 goes into the card hole 13 of horizontal base plate 2, horizontal base plate 2 is fixed to be set up at the top of vertical base plate 1 and with vertical base plate 1 mutually perpendicular, the top of vertical base plate 1 is all stretched out at the both ends of horizontal base plate 2, sets up a breach 9 on the horizontal base plate 2. The horizontal base plate 2 is also provided with a mounting groove I29 for placing a display part and a mounting groove II 30 for placing an input part, a signal and an information processing circuit, a display screen 6 can be installed in the mounting groove I29, and a dsPIC33EP chip 5 and other circuit modules can be installed in the mounting groove II 30. The fixture block 12 is matched with the fixture hole 13 to ensure that the vertical substrate 1 is vertical to the horizontal substrate 2, and further, the zero point of the vertical substrate 1 is superposed with the bottom surface of the horizontal substrate 2, so that the zero points of measurement, calculation, tool setting and leaning correction are defined. The vertical base plate 1 and the horizontal base plate 2 which are perpendicular to each other after being connected are used for being attached to a workpiece to be processed which is vertically and horizontally placed (namely, the vertical wooden plate 22 and the horizontal wooden plate 23) so as to read a vertical direction zero point position processed by the cutter 24, and the positional relationship of the vertical wooden plate 22, the horizontal wooden plate 23, the copying guiding rule 25, the cutter 24 and the cutter bearing 26 is shown in fig. 4.

Trapezoidal fixed plate 3 is vertical to be set up and fixes on vertical base plate 1, in this embodiment, set up two location mounting holes I14 and two location pinhole I15 on vertical base plate 1, set up two location mounting holes II 16 and two location pinhole II 17 on trapezoidal fixed plate 3, as shown in fig. 5, two location mounting holes I14 correspond one-to-one with two location mounting holes II 16, two location pinhole I15 correspond one-to-one with two location pinhole II 17, locating pin 18 passes location pinhole I15 and location pinhole II 17, trapezoidal fixed plate 3 is through two locating pins 18 accurate positioning on vertical base plate 1, locking screw 19 passes location mounting hole I14 and location mounting hole II 16, trapezoidal fixed plate 3 is through two locking screw 19 and vertical base plate 1 fixed connection. The trapezoid fixing plate 3 is a right trapezoid with a large upper part and a small lower part, the inclined waist of the trapezoid fixing plate 3 is the sliding track basis of the trapezoid moving plate 4, the inclined waist of the trapezoid fixing plate 3 and the lower bottom form an included angle alpha, and the included angle alpha is equal to the included angle formed by the isosceles trapezoid waist formed by the axial section of the cutting edge of the cutter 24 and the lower bottom; the top surface of the trapezoidal fixing plate 3 and the top surface of the vertical substrate 1 are both on the same plane with the lower surface of the horizontal substrate 2. Wherein the cotangent value of the included angle alpha is related to the calculation of the position relation size of the copying guiding rule 25 and the edge of the workpiece timber.

The trapezoidal movable plate 4 is vertically arranged on the vertical base plate 1, the trapezoidal movable plate 4 is a right-angled trapezoid with a small upper part and a large lower part, and as shown in fig. 6, an included angle alpha is formed between the oblique waist of the trapezoidal movable plate 4 and the lower bottom; the inclined waist of the trapezoidal movable plate 4 is close to the inclined waist of the trapezoidal fixed plate 3 and can slide on the vertical base plate 1 along the inclined waist of the trapezoidal fixed plate 3; in this embodiment, a threaded hole 27 is formed in the vertical substrate 1, a positioning rod 20 is disposed on the vertical substrate 1, the positioning rod 20 in this embodiment is a screw, the front end of the screw is screwed into the threaded hole 27, a sliding slot 21 parallel to the oblique waist of the trapezoidal fixing plate 3 is disposed on the trapezoidal movable plate 4, and the positioning rod 20 passes through the sliding slot 21 and is in sliding fit with the sliding slot 21. An electrode I10 and an electrode II 11 are arranged on the trapezoidal movable plate 4, the electrode I10 corresponds to the resistance ruler I7, and the electrode II 11 corresponds to the resistance ruler II 8. One side of the top end of the trapezoidal movable plate 4 close to the straight waist corresponds to the notch 9, and the length of the top end of the trapezoidal movable plate 4 is greater than that of the notch 9; when the trapezoidal movable plate 4 slides to the uppermost end, the top end surface of the trapezoidal movable plate 4 is on the same plane with the bottom surface of the horizontal substrate 2, and the straight waist of the trapezoidal movable plate 4 extends out of the end surface of the corresponding vertical substrate 1.

The upper end f1 of the resistance ruler I7 and the lower end f4 of the resistance ruler II 8 are respectively connected with a power supply, and the lower end f3 of the resistance ruler I7 and the upper end f2 of the resistance ruler II 8 are grounded; the two ends f1 and f3 of the resistance ruler i 7, the two ends f2 and f4 of the resistance ruler ii 8, the electrode i 10 and the electrode ii 11 form a full bridge differential circuit, and the length is changed into a resistance value as shown in fig. 7. A capacitor C14 is connected in parallel between the electrode I10 and the lower end f3 of the resistance ruler I7, and a capacitor C15 is connected in parallel between the electrode II 11 and the upper end f2 of the resistance ruler II 8.

The electrode i 10 and the electrode ii 11 are input to the dsPIC33EP chip 5 according to the actually measured voltage signal V1 and the voltage signal V2, as shown in fig. 8, the analog signal is converted into a 12-bit digital signal by the a/D sampling module of the dsPIC33EP chip itself, the voltage signal is converted into the height of the position where the trapezoidal movable plate 4 vertically moves by the dsPIC33EP chip 5, the height of the position is the tenon processing height h, and the difference l between the right-angled waist edge of the trapezoidal movable plate 4 and the edge of the vertical substrate 1 is calculated by the following formula:

l＝(R_z-R_d+hcotα)

wherein l is the edge difference between the right-angled waist edge of the trapezoidal movable plate 4 and the vertical substrate 1, and R is_zIs the bearing radius of the tool, R_dThe radius of the cutting edge at the end part of the cutter, and alpha is the included angle between the cutting edge and the bottom edge of the section of the cutter; determining the optimal position of the profiling guiding rule and the edge of the vertical wood board according to the edge difference l; the tenon machining height h and the edge difference l are both sent to the display screen 6 through SPI bus communication.

In this embodiment, the intelligent differential tool setting and leaning-correcting slide rule further includes a zero point and range correcting module, a material information calling module, and a current operation confirming module.

The zero and measuring range correction module comprises a button K1, a resistor R7, a capacitor C16 and a resistor R10, as shown in FIG. 9, one end of the button K1 is grounded, the other end of the button K1 is connected with one end of a resistor R7, the other end of the resistor R7 is connected with a power supply, one ends of the capacitor C16 and the resistor R10 are both connected with one end of the resistor R7, the other end of the capacitor C16 is grounded, and the other end of the resistor R10 is connected with a pin on the dsPIC33EP chip 5. When the trapezoidal movable plate 4 moves to the uppermost end, namely the top end of the trapezoidal movable plate 4 is propped against the bottom surface of the horizontal substrate 2, a button K1 is pressed, the height of the position corresponding to the voltage signal V1 and the voltage signal V2 actually measured by the electrode I10 and the electrode II 11 at the moment is set as a zero point, and the dsPIC33EP performs zero point correction calculation and system error compensation calculation; after the zero point is confirmed, the range setting is carried out for calibrating the relation between the voltage and the length.

The material information calling module comprises a button K2, a resistor R8, a capacitor C17 and a resistor R11, as shown in FIG. 10, one end of the button K2 is connected with a zero line, the other end of the button K2 is connected with one end of a resistor R8, the other end of the resistor R8 is connected with a power supply, one ends of the capacitor C17 and the resistor R11 are connected with one end of the resistor R8, the other end of the capacitor C17 is connected with the zero line, and the other end of the resistor R11 is connected with a pin on the dsPIC33EP chip 5. The material information stored in the dsPIC33EP may be recalled before processing to show a reference value for the process height.

The current operation confirmation module comprises a button K3, a resistor R9, a capacitor C18 and a resistor R12, as shown in FIG. 11, one end contact of the button K3 is connected with the zero line, the other end contact of the button K3 is connected with one end of a resistor R9, the other end of the resistor R9 is connected with a power supply, one ends of the capacitor C18 and the resistor R12 are connected with one end of the resistor R9, the other end of the capacitor C18 is connected with the zero line, and the other end of the resistor R12 is connected with a pin on the dsPIC33EP chip 5. The current operation confirming module is used for confirming the current operation.

The power supply required by the dsPIC33EP chip 5, the display screen 6, the full-bridge differential circuit, the zero point and range correction module, the material information calling module and the current operation confirmation module is 3.3V, and the voltage of the 3.6V lithium battery is reduced to 3.3V through the power supply circuit shown in figure 12. The machining pitch of the profile guiding rule is shown in fig. 13, and the structure and parameters of the dovetail cutter are shown in fig. 14. When the machining height is zero, i.e., the upper bottom surface of the trapezoidal movable plate 4 is in contact with the bottom surface of the horizontal base plate 2, i.e., when the machining height is zero₀＝R_z-R_d，l₀Namely, when the trapezoidal movable plate 4 is at the zero point, the right-angled waist of the trapezoidal movable plate 4 is different from the edge of the vertical base plate 1. Since the radius of the tool bearing 26 and the tool 24 are known, this fixed value is a constant term for calculating the edge difference. Along with the change of the processing height of the sliding tenon along the inclined waist of the trapezoidal movable plate 4 and the change of the voltage output value of the full-bridge differential circuit, the voltage signal change is converted into the processing height h of the tenon by the dsPIC33EP chip 5, the edge difference l is calculated, and the right-angled waist of the trapezoidal movable plate 4 is attached to the edge of the vertical wood board 22 after the edge difference l is calculated; the sliding profiling guiding rule 25 is attached to the edge of the vertical substrate 1 and fixed, and the calibration operation of the profiling guiding rule 25 can be completed.

The display screen 6 is used for displaying the common materials, the processing height and depth of the common materials, the current processing height and depth, whether zero point correction is completed or not and the like. The dsPIC33EP chip 5 may be used to correct zero errors, set range and system process parameters, and look up process data. Because the axial section of the cutter 24 is a trapezoid with a small top and a large bottom, the downward acting force in the machining process enables the actual machining height of the cutter 24 to be larger than the corresponding position elevations of the voltage signal V1 and the voltage signal V2 actually measured by the electrode I10 and the electrode II 11, and therefore machining errors of the height and the tenon depth are generated. This error varies from one processing apparatus to another. Different materials and processing equipment can be selected through keys, and the position relation between the profiling guiding rule 25 and the vertical wood board 22 can be adjusted more accurately according to the processing error data recorded before so as to optimize an algorithm. The dsPIC33EP chip 5 is used for processing signals of the full-bridge differential circuit, and converting analog signals into 12-bit digital signals through an A/D sampling module of the dsPIC33EP chip according to actual measured voltage signals (V1 and V2); calling stored relation information of the wood and the tenon machining height; and calling preset system processing error, range and zero correction information, performing floating point calculation by combining a position relation formula, processing data to complete a corresponding algorithm, and sending a final result to the display screen 6 through SPI communication. The reference voltage of the bridge resistor is supplied by 3.3V voltage stabilization by a single linear voltage stabilization chip LM1117, so that the interference of different devices on the sampling voltage is prevented. By the method, the processing capacity of the measurement error can be improved, and the reading precision is improved; the position relation precision of the correction profiling guiding rule 25 and the vertical wood board 22 is improved.

The steps of using the intelligent differential tool setting calibrating slide rule are as follows:

in the first step, the processing depth of the tenon of the vertical wood board 22 and the mortise of the horizontal wood board 23 is determined. The processing depth of the tenon and mortise is measured by clamping the vertical wood board 22 and the horizontal wood board 23 by the horizontal base plate 2 and the trapezoidal movable plate 4. The stroke M of the cutter 24 is adjusted through the schematic diagram shown in FIG. 16, and the stroke limiter 28 of the wood milling machine is adjusted according to the position of the cutter 24, so that the processing depth of the tenon mortise is determined.

And secondly, determining the processing height h of the dovetail cutter according to the material information, and determining the processing height of the tenon and mortise by touching the lower bottom of the dovetail cutter with the upper bottom of the trapezoidal movable plate 4 according to the display of the graph 16 and the graph 17.

And thirdly, determining the optimal position relation between the profiling guiding rule 25 and the vertical wood board 22 according to the l value calculated and corrected in the second step. In the method shown in fig. 18, the right-angled waist of the trapezoidal movable plate 4 is fixedly attached to the edge of the vertical wooden plate 22, and the copying template 25 is moved to be attached and fixed to the vertical base plate 1.

The common material types stored in the dsPIC33EP chip 5 can be selected through a button K2, and the compensated machining error data of the wood board and the wood milling machine is output to a display screen, so that the accurate reference and the adjustment of the machining depth and height are facilitated. And the calculation and display of error compensation are completed through an algorithm program of the dsPIC33EP chip 5, so that the operation of the third step is simplified, and the operation time is saved.

Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.