Universal grinding machine

Abstract

The invention relates to the technical field of grinding devices, and particularly discloses a universal grinding machine which comprises a machine base, grinding mechanisms are arranged at the upper end of the machine base, a supporting table for containing a workpiece is arranged at the upper end of the machine base, a pressing plate for pressing the workpiece is arranged above the supporting table, and the grinding mechanisms with the adjustable positions are arranged on the two sides of the supporting table. The grinding mechanism comprises a grinding belt driven by a motor, a lower inclined face for grinding the upper edge of the workpiece and an upper inclined face for grinding the lower edge of the workpiece are arranged at the end, facing the workpiece, of the grinding belt, a feeding table is arranged at the front end of the machine base and comprises a base, and a translation base with the height and the left-right position adjustable is arranged in the base. A feeding plate with the front-back distance adjustable is arranged at the upper end of the translation seat, and a replaceable clamp is arranged on the feeding plate. The three-stage adjusting mechanical feeding table is adopted, the cost is saved, the double-slope grinding belt is adopted, grinding is more comprehensive, workpieces with different widths and thicknesses are covered, and the applicability is wide.

Description

Technical Field

[0001] The present invention relates to the technical field of grinding devices, in particular to a universal grinding machine. Background Art

[0002] During the production process of workpieces, welding and cutting end faces are often polished. Patent CN222430265U discloses a workpiece polishing device that uses a robot to load the workpiece. After loading, the workpiece is clamped and fixed, and its two ends are polished by a grinding wheel. The grinding wheel (according to the attached figure, the grinding surface of the grinding wheel faces upward) can move left and right and up and down. This technical solution reduces the time and error of manual operation through automated control, and improves the efficiency of polishing.

[0003] However, the above solution still has the following problems: 1. The use of robot loading has high manufacturing costs, which is difficult for small and medium-sized enterprises to afford; 2. The grinding wheel is used for grinding, and the grinding surface of the grinding wheel (according to the attached figure, the grinding surface of the grinding wheel faces upward) is fixed in direction, and the upper edge cannot be ground. The grinding range is not comprehensive enough and the versatility is poor. Summary of the Invention

[0004] The present invention is aimed at the above-mentioned deficiencies in the prior art and provides a universal grinding machine. It adopts a three-level adjustment mechanical loading table to lower the usage threshold, making it easy for small and medium-sized enterprises to bear the equipment investment and popularize automated grinding. At the same time, it adopts a double-bevel grinding belt, which makes grinding more comprehensive. The grinding belt spacing and grinding depth are adjustable to cover workpieces of different widths and thicknesses, and has a wide applicability. To achieve the above object, the present invention provides the following technical solutions: A universal grinder, which includes a machine base, a grinding mechanism is provided at the upper end of the machine base, a support table for placing a workpiece is provided at the upper end of the machine base, a pressure plate for pressing the workpiece is provided above the support table, and position-adjustable grinding mechanisms are provided on both sides of the support table, the grinding mechanism includes a grinding belt driven by a motor, and the end of the grinding belt facing the workpiece is provided with a lower inclined surface for grinding the upper edge of the workpiece and an upper inclined surface for grinding the lower edge of the workpiece, a loading platform is provided at the front end of the machine base, and the loading platform includes a base, a translation seat with adjustable height and left and right position is provided in the base, a feed plate with adjustable front and rear distance is provided at the upper end of the translation seat, and a replaceable clamp is provided on the feed plate.

[0005] Preferably, a protective cover is provided at the upper end of the machine base, and the side of the protective cover facing the feeding table is an open structure. The upper end of the protective cover is provided with a first oil cylinder for driving the pressure plate. The bottom of the support table is connected to the machine base through a support plate. A fixed seat and a movable seat for fixing the grinding mechanism are respectively provided on both sides of the support plate. A second oil cylinder and a fourth guide rail are provided at the upper end of the machine base. The lower end of the movable seat cooperates with the fourth guide rail through a fourth slider. The second oil cylinder pulls the movable seat to move horizontally. A positioning rod is provided on the side wall of the support plate. A top frame is provided at the upper end of the movable seat. The top frame cooperates with the positioning rod to clamp the workpiece. Preferably, the upper ends of the movable seat and the fixed seat are both provided with a sixth guide rail and a third oil cylinder, the grinding mechanism also includes a bracket, the lower end of the bracket cooperates with the sixth guide rail through a sixth slider, the third oil cylinder pulls the bracket to move horizontally, a bracket is provided above the bracket, a fifth guide rail and a cylinder connected to the bracket are provided on the side wall of the bracket, one end of the bracket is connected to a side plate, the side plate cooperates with the fifth guide rail through the fifth slider, the upper end of the bracket is provided with a support plate, one side of the support plate is provided with a pulley and a support wheel supporting the grinding belt, and the other side of the support plate is provided with a third motor driving the pulley. Preferably, the lower end of the lifting platform is connected to the base through a screw lift, and a second guide rail is provided on the inner side wall of the base. Both ends of the lifting platform cooperate with the second guide rail through a second slider, and the upper end of the lifting platform is provided with a third guide rail. A rack is provided on the side wall of the lifting platform. The lower end of the translation seat cooperates with the third guide rail through the third slider, and one end of the translation seat is connected to the second motor. The output shaft of the second motor is provided with a gear meshing with the rack, and the upper end of the translation seat is provided with a first guide rail and a first screw perpendicular to the third guide rail, and one end of the first screw is connected to the first motor, and the bottom of the feeding plate cooperates with the first guide rail through the first slider and cooperates with the first screw through a nut sleeve.

[0006] Preferably, a positioning block and a quick clamp are provided at the upper end of the feed plate, and a mounting plate is connected to the bottom of the clamp. One end of the mounting plate is provided with a positioning groove that cooperates with the positioning block, and the other end of the mounting plate is pressed and fixed by a quick clamp.

[0007] Preferably, the clamp includes a first clamping jaw capable of clamping left and right and a second clamping jaw capable of clamping up and down.

[0008] Preferably, the second clamping jaw includes a shell, a front end of the shell is provided with a carrier plate that can move forward and backward, and an upper and lower clamping seat are provided on the side wall of the carrier plate, and the clamping seat is respectively connected with an upper claw and a lower claw through a rotating shaft, and the upper claw and the lower claw are respectively connected to the carrier plate through a second spring, and a fourth oil cylinder is provided in the shell, and the end of the piston rod of the fourth oil cylinder is connected to a push rod, which passes through the carrier plate and is located between the upper claw and the lower claw, and the push rod is connected to an upper push block for pushing the upper claw to close and a lower push block for pushing the lower claw to close through a push plate.

[0009] Preferably, the back of the carrier plate is connected to an upper guide plate and a lower guide plate that cooperate with the inner wall of the shell, the end of the lower guide plate is provided with a baffle, and the inner wall of the shell is provided with a limit block that cooperates with the baffle.

[0010] Preferably, the upper end of the lower guide plate is provided with a support column, and guide cylinders and guide pins are respectively provided on both sides of the support column, the support column is connected to a rocker arm through a rotating shaft, and one end of the rocker arm is connected to a rocker column, a lock pin is slidably fitted in the guide cylinder, the rocker column passes through the lock pin and slides with the lock pin, and the lower end of the lock pin can extend from the bottom of the lower guide plate, a pressure frame is provided on the back of the carrier plate, a first spring is connected between the side wall of the pressure frame and the lower guide plate, the guide pin is inserted into the bottom of the pressure frame, the pressure frame and the guide pin are slidably fitted, the push rod and the rocker arm are both located in the pressure frame, the upper end of the push rod is provided with a stop groove that cooperates with the pressure frame, and one side of the stop groove is provided with an inclined lifting surface The upper inner wall of the pressing frame is an inclined surface; when the second clamping jaw is in the initial state, the pressing frame cooperates with the baffle groove. When the piston rod of the fourth oil cylinder is extended, the push rod pushes the carrier plate forward through the pressing frame. When the baffle plate cooperates with the limit block, the push rod continues to move forward, and the lifting surface lifts the pressing frame. At this time, the lock pin drives the rocker arm to rotate under the action of gravity, and the lower end of the lock pin extends from the bottom of the lower guide plate and cooperates with the end of the outer shell to fix the front and rear positions of the carrier plate. The push rod continues to move forward and drives the upper and lower jaws through the upper and lower push blocks to realize the clamping action. When clamping, the lower jaw first flattens the plate workpiece, and then the upper jaw presses on the upper end of the plate workpiece to complete the clamping.

[0011] Preferably, the front end of the carrier plate is connected to a vertical positioning plate through a support block, and the positioning plate is located between the upper claw and the lower claw and in front of the push plate. Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention adopts a three-level adjustment mechanical loading platform (vertical lifting + left and right translation + front and back feeding) to replace high-priced robots, which has accurate loading, saves costs, lowers the usage threshold, makes it easy for small and medium-sized enterprises to bear the equipment investment, and popularizes automated grinding; at the same time, a double-bevel grinding belt is used to complete the grinding of the upper and lower edges of the workpiece in a single time, avoiding manual flipping or changing of tools, improving grinding efficiency, and achieving efficient grinding. Moreover, a flexible fitting method is adopted between the grinding belt and the workpiece, which makes the grinding more comprehensive. The grinding belt spacing and grinding depth are adjustable to cover workpieces of different widths and thicknesses, greatly improving the versatility of the equipment; the device integrates automatic loading, automatic positioning and clamping of workpieces, automatic grinding, and automatic unloading functions, significantly reducing manual intervention and improving production efficiency. The feeding platform is closely connected with the grinding station, and the loading, processing, and unloading processes are smooth, shortening non-processing time and improving continuous operation capacity.

[0012] 2. The present invention can lock the annular workpiece in three directions, with the positioning rod (left limit), the movable top frame (right top tightening), and the pressure plate (vertically pressing the weld firmly), forming a rigid triangular constraint to suppress grinding vibration, ensure dimensional accuracy, and avoid the risk of deformation caused by traditional clamping; and the pressure plate and the support table cooperate to press the weld position to ensure that the weld is level and prevent tilting, so that 3. The second clamping jaw of the present invention adopts sophisticated linkage, which can realize self-locking positioning and anti-retraction of the carrier plate when in use, ensure the reliability of use, improve the clamping rigidity, and adopt the method of lifting first and then clamping to ensure that the plate workpiece can be clamped horizontally, ensuring the reliability of the plate workpiece when loading and placing. At the same time, it can avoid warping of the plate during unloading and clamping, and protect thin plate workpieces.

[0013] 4. The positioning block and quick clamp on the feed plate of the present invention realize the rapid replacement and accurate positioning of the clamp (first clamping jaw / second clamping jaw), and seamlessly switch the clamping of wheel hub annular workpieces and plate workpieces.

[0014] 5. The bevel grinding belt of the present invention (the upper bevel is used to grind the lower edge, and the lower bevel is used to grind the upper edge) is combined with precise position control (spacing, height, and feed) to ensure uniform and consistent edge burr removal. The grinding belts on both sides can grind both sides of the workpiece simultaneously (such as the lower edge), or alternately grind the upper and lower edges by switching the height, which is highly efficient and symmetrical. All moving parts (translation seat, lifting platform, feed plate, support seat, and support plate) are equipped with guide rails and sliders to ensure smooth movement and good rigidity, reduce vibration, and improve the quality of the polished surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 Schematic diagram of the three-dimensional structure of the loading platform Figure 1 ; Figure 3 Schematic diagram of the three-dimensional structure of the loading platform Figure 2 ; Figure 4 This is the main view of the loading platform; Figure 5 It is a structural diagram of the cooperation between the first clamping jaw and the feeding plate; Figure 6 It is the structural diagram of the grinding machine; Figure 7 It is a structural diagram of the grinding mechanism; Figure 8 Schematic diagram of the three-dimensional structure of the second clamping jaw; Figure 9 is a cross-sectional view of the second clamping jaw in an initial state; Figure 10 It is a cross-sectional view of the lower clamping jaw of the second clamping jaw when lifting the workpiece; Figure 11 It is a cross-sectional view of the second clamping jaw clamping the workpiece; Figure 12 This is a cross-sectional view of the upper and lower jaws clamping the workpiece; Figure 13 Schematic diagram of the structure of the lower claw; Figure 14 It is a structural diagram of the push-down block; Figure 15 It is a structural diagram of the cooperation between the push rod and the push plate; Figure 16 for Figure 9 A schematic diagram of the enlarged structure at point A; In the figure: 1-grinding machine; 101-machine base; 102-protective cover; 103-support plate; 104-positioning rod; 105-support table; 106-pressing plate; 107-first oil cylinder; 108-second oil cylinder; 109-fourth guide rail; 110-fixed seat; 111-movable seat; 112-top frame; 113-fourth slide; 2-loading platform; 201-base; 202-lifting platform; 203-translation seat; 204-first guide rail; 205-first wire Lever; 206-first motor; 207-feeding plate; 208-second guide rail; 209-second slider; 210-screw lift; 211-third guide rail; 212-gear; 213-rack; 214-second motor; 215-first slider; 216-third slider; 217-positioning block; 218-quick clamp; 3-first clamp; 4-grinding mechanism; 401-third motor; 402-pulley; 403-grinding belt; 404-support plate ;405-support wheel;406-support plate;407-side plate;408-fifth guide rail;409-support seat;410-sixth guide rail;411-sixth slider;412-third oil cylinder;413-cylinder;414-fifth slider;5-mounting plate;501-positioning groove;6-second clamping jaw;601-housing;602-upper guide plate;603-carrying plate;604-clamping seat;605-push plate;606-upper push block;607-upper claw;608- Lower claw; 609- push-down block; 610- positioning plate; 611- support block; 612- pressure frame; 613- guide pin; 614- rocker arm; 615- support column; 616- locking pin; 617- rocker column; 618- lower guide plate; 619- limit block; 620- baffle; 621- fourth oil cylinder; 622- first spring; 623- second spring; 624- push rod; 625- guide cylinder; 626- stop groove; 627- lifting surface; 7- sheet workpiece. DETAILED DESCRIPTION The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0016] like Figure 1 As shown, a universal grinding machine 1 is provided, which includes a machine base 101. A grinding mechanism 4 and a support platform 105 for placing a workpiece are provided at the upper end of the machine base 101. A pressing plate 106 for pressing the workpiece is provided above the support platform 105. Grinding mechanisms 4 with adjustable positions (height and distance from the workpiece) are provided on both sides of the support platform 105. The grinding mechanism 4 includes a grinding belt 403 driven by a motor. The grinding belt 403 is provided with a lower inclined surface for grinding the upper edge of the workpiece and an upper inclined surface for grinding the lower edge of the workpiece at one end facing the workpiece. A loading platform 2 is provided at the front end of the machine base 101. The loading platform 2 includes a base 201. A height-adjustable lifting platform 202 and a left and right position-adjustable translation seat 203 are provided in the base 201. A feeding plate 207 with adjustable front and rear distances is provided at the upper end of the translation seat 203. A replaceable clamp is provided on the feeding plate 207, and different clamps are used to clamp different workpieces.

[0017] The specific structure is: like Figure 6 As shown, a protective cover 102 is provided at the upper end of the machine base 101, and the side of the protective cover 102 facing the feeding platform is an open structure. A first oil cylinder 107 for driving the pressure plate 106 is provided at the upper end of the protective cover 102, and the bottom of the support platform 105 is connected to the machine base 101 through a support plate 103. A fixed seat 110 and a movable seat 111 for fixing the grinding mechanism 4 are respectively provided on both sides of the support plate 103. A second oil cylinder 108 and a fourth guide rail 109 are provided at the upper end of the machine base 101, and the lower end of the movable seat 111 cooperates with the fourth guide rail 109 through a fourth slider 113. The second oil cylinder 108 pulls the movable seat 111 to move horizontally along the fourth guide rail 109. A positioning rod 104 is provided on the side wall of the support plate 103, and a top frame 112 is provided at the upper end of the movable seat 111. The top frame 112 cooperates with the positioning rod 104 to clamp the workpiece. like Figure 7As shown, the upper ends of the movable seat 111 and the fixed seat 110 are both provided with a sixth guide rail 410 and a third oil cylinder 412. The grinding mechanism 4 also includes a bracket 409. The lower end of the bracket 409 cooperates with the sixth guide rail 410 through a sixth slider 411. The third oil cylinder 412 pulls the bracket 409 to translate along the sixth guide rail 410. A support plate 406 is provided above the bracket 409. The side wall of the bracket 409 is provided with a fifth guide rail 408 and a support plate 406 connected to the support plate 406. The support plate 406 is connected to the cylinder 413, and one end of the support plate 406 is connected to the side plate 407. The side plate 407 cooperates with the fifth guide rail 408 through the fifth slider 414. The upper end of the support plate 406 is provided with a support plate 404, and one side of the support plate 404 is provided with a pulley 402 and a support wheel 405 for supporting the grinding belt 403. The shape of the grinding belt 403 is supported and determined by the pulley 402. The other side of the support plate 404 is provided with a third motor 401 for driving the pulley 402.

[0018] According to the width of the workpiece, the distance between the two grinding belts 403 is adjusted by the translation of the movable seat 111. During the grinding process, the feeding and retraction of the grinding belt 403 are realized by moving the support seat 409, and the height switching of the grinding belt 403 is adjusted by the cylinder 413 to realize the switching of the upper and lower inclined surfaces of the grinding belt 403. like Figure 2 、 Figure 3 、 Figure 4 The lower end of the lifting platform 202 is connected to the base 201 through a screw lift, and the screw lift 210 is driven by a motor to achieve height adjustment of the lifting platform 202. A second guide rail 208 is provided on the inner side wall of the base 201, and both ends of the lifting platform 202 cooperate with the second guide rail 208 through a second slider 209 to ensure the stability of the height adjustment of the lifting platform 202; a third guide rail 211 is provided at the upper end of the lifting platform 202, and a rack 213 is provided on the side wall of the lifting platform 202. The lower end of the translation seat 203 cooperates with the third guide rail 211 through a third slider 216, and one end of the translation seat 203 is connected There is a second motor 214, and the output shaft of the second motor 214 is provided with a gear 212 engaged with the rack 213. The left and right position adjustment of the translation seat 203 is realized by the second motor 214. The upper end of the translation seat 203 is provided with a first guide rail 204 and a first screw 205 perpendicular to the third guide rail 211. One end of the first screw 205 is connected to the first motor 206. The bottom of the feed plate 207 is matched with the first guide rail 204 through the first slider 215 and the first screw 205 through the nut sleeve. The feed plate 207 is used to feed the workpiece into the grinder 1, and the workpiece is taken out after grinding.

[0019] like Figure 5As shown, the upper end of the feed plate 207 is provided with two positioning blocks 217 and two quick clamps 218, and the bottom of the clamp is connected to a mounting plate 5, one end of the mounting plate 5 is provided with a positioning groove 501 that cooperates with the positioning block 217, and the other end of the mounting plate 5 is pressed and fixed by the quick clamp 218.

[0020] The clamp comprises a first clamping jaw 3 capable of clamping leftwards and rightwards and a second clamping jaw 6 capable of clamping upwards and downwards.

[0021] The structure of the first clamping jaw 3 is similar to the clamping portion of a workpiece grinding device disclosed in patent CN222430265U, and can be used to clamp annular workpieces such as wheel hub rim pre-processed parts.

[0022] The annular workpiece is placed on the support platform 105 from one side, and the weld is located at the upper end of the support platform 105. The left side leans against the positioning rod 104, and the weld is pressed by the pressure plate 106. The movable seat 111 moves horizontally so that the top frame 112 supports the other side of the workpiece. The top frame 112 and the positioning rod 104 position the workpiece left and right. The upper inclined surface of the grinding belt 403 can be used to grind the lower edges on both sides of the workpiece first. During grinding, the third oil cylinder 412 is started to drive the grinding belt 403 to move toward the workpiece so that the grinding belt 403 is pressed against the side wall of the workpiece. After grinding is completed, the grinding belt 403 retreats and leaves the workpiece. After the cylinder 413 raises the grinding belt 403, the grinding belt 403 moves toward the workpiece again so that the lower inclined surface of the grinding belt 403 grinds the upper edge of the workpiece. After grinding is completed, the grinding belt 403 retreats and leaves the workpiece. After grinding is completed, the pressing plate 106 is raised, the top frame 112 moves to the right, the workpiece is released, and the first clamping jaw 3 removes the workpiece from the support platform 105.

[0023] like Figure 8 、 Figure 9 、 Figure 10 、 Figure 11 、 Figure 12As shown, the second clamping jaw 6 includes a housing 601, a front end of the housing 601 is provided with a carrier plate 603 that can move forward and backward, the back of the carrier plate 603 is connected to an upper guide plate 602 and a lower guide plate 618 that cooperate with the inner wall of the housing 601, the end of the lower guide plate 618 is provided with a baffle 620, and the inner wall of the housing 601 is provided with a limit block 619 that cooperates with the baffle 620 to limit the maximum forward distance of the carrier plate 603; the front of the carrier plate 603 is provided with an upper and a lower clamping seat 604, and the clamping seat 604 is respectively connected to an upper claw 607 and a lower claw 608 through a rotating shaft, and the upper claw 607 The upper claw 607 and the lower claw 608 are connected to the carrier plate 603 through the second spring 623 respectively. The second spring 623 pulls the upper claw 607 and the lower claw 608 to keep them in the open state. A fourth oil cylinder 621 is provided in the shell 601. The end of the piston rod of the fourth oil cylinder 621 is connected to the push rod 624. The push rod 624 passes through the carrier plate 603 and is located between the upper claw 607 and the lower claw 608. When in use, the push rod 624 pushes the carrier plate 603 to open. At the same time, the push rod 624 is connected to the upper push block 606 that pushes the upper claw 607 to close and the lower push block 609 that pushes the lower claw 608 to close through the push plate 605.

[0024] A support column 615 is provided at the upper end of the lower guide plate 618. A guide cylinder 625 and a guide pin 613 are provided on both sides of the support column 615. The support column 615 is connected to the rocker arm 614 through a rotating shaft. One end of the rocker arm 614 is connected to the rocker column 617. A lock pin 616 is slidably fitted in the guide cylinder 625. The rocker column 617 passes through the lock pin 616 and slides with the lock pin 616 to ensure that when the rocker arm 614 rotates, the rocker column 617 can drive the lock pin 616 to move up and down. The lower end of the lock pin 616 It can extend from the bottom of the lower guide plate 618. A pressing frame 612 is provided on the back of the carrier plate 603. The pressing frame 612 is attached to the side wall of the carrier plate 603. A first spring 622 is connected between the side wall of the pressing frame 612 and the lower guide plate 618. The first spring 622 pulls the pressing frame 612 downward. The guide pin 613 is inserted into the bottom of the pressing frame 612. The pressing frame 612 and the guide pin 613 are slidably matched to ensure that the pressing frame 612 can only move up and down. The push rod 624 and the rocker arm 614 are both located in the pressing frame 612. Figure 15 、 Figure 16As shown, the upper end of the push rod 624 is provided with a retaining groove 626 that cooperates with the pressing frame 612, and one side of the retaining groove 626 is provided with an inclined lifting surface 627, and the upper inner wall of the pressing frame 612 is an inclined surface; when the second clamping jaw 6 is in the initial state, the pressing frame 612 cooperates with the retaining groove 626. When the piston rod of the fourth oil cylinder 621 is extended, due to the retaining groove 626 cooperating with the pressing frame 612, the push rod 624 will push the carrier plate 603 forward through the pressing frame 612. When the baffle 620 cooperates with the limit block 619, the carrier plate 603 can no longer move forward, and the push rod 624 continues to move forward, and the lifting surface 627 will be inserted into the pressing frame 612. As the lifting surface 627 tilts to When the handle 614 is in the upright position, the support rod 612 will lift up the pressing frame 612. As the pressing frame 612 rises, the end of the rocker arm 614 loses its restraint. At this time, the locking pin 616 moves downward under the action of gravity, driving the rocker arm 614 to rotate. The lower end of the locking pin 616 extends from the bottom of the lower guide plate 618 and cooperates with the end of the shell 601, so that the lower guide plate 618 cannot retreat. Under the action of the locking pin 616 and the baffle 620, the front and rear positions of the carrier plate 603 are fixed. The push rod 624 continues to move forward and drives the upper push block 606 and the lower push block 609 to move forward through the push plate 605. The upper push block 606 and the lower push block 609 respectively drive the upper claw 607 and the lower claw 608 to achieve the clamping action.

[0025] The front end of the carrier plate 603 is connected to a vertical positioning plate 610 through a support block 611. The positioning plate 610 is located between the upper claw 607 and the lower claw 608 and in front of the push plate 605. When clamping, the end of the workpiece is pressed against the positioning plate 610 for position positioning and then clamped.

[0026] When clamping, the lower jaw 608 first flattens the plate workpiece 7, and then the upper jaw 607 presses on the upper end of the plate workpiece 7 to complete the clamping. Figure 13 As shown, the bottom of the lower claw 608 is provided with an inclined surface A and a horizontal surface B, and the inclined surface A is connected to the left side of the horizontal surface B, as shown in FIG. Figure 14 As shown, a horizontal plane C is provided at the upper end of the push-down block 609, and an inclined plane D is connected to the right end of the horizontal plane C. When clamping, the inclined plane D cooperates with the inclined plane A. As the push-down block 609 moves forward, the push-down block 609 levelizes the lower jaw 608, that is, the clamping end of the lower jaw 608 is in a horizontal state. At this time, the horizontal plane C cooperates with the horizontal plane B to maintain the horizontal state of the lower jaw 608, and the push-up block 606 pushes the upper jaw 607 to rotate downward to complete the clamping of the plate workpiece 7.

[0027] During reset, the fourth oil cylinder 621 retracts, pulling the push rod 624 back, and after the lifting surface 627 is pulled out from the pressure frame 612, the pressure frame 612 moves downward under the pull of the first spring 622, and the pressure frame 612 presses down the rocker arm 614. The rocker arm 614 pulls up the locking pin 616 through the rocker column 617, and the bottom of the locking pin 616 is retracted into the guide cylinder 625. The push rod 624 continues to retreat, and after the push plate 605 contacts the carrier plate 603, it will drive the carrier plate 603 to move backward to achieve reset.

[0028] The plate workpiece 7 is fed onto the support platform 105 , and the pressing plate 106 presses and fixes the plate workpiece 7 , and then grinds burrs on both ends of the workpiece. After grinding, the workpiece is unloaded through the second clamping jaw 6 .

[0029] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A universal grinding machine, comprising a base, an upper end of which is provided with a grinding mechanism, characterized in that: A support platform for placing the workpiece is provided at the upper end of the machine base, a pressure plate for pressing the workpiece is provided above the support platform, and position-adjustable grinding mechanisms are provided on both sides of the support platform, and the grinding mechanism includes a grinding belt driven by a motor, and the end of the grinding belt facing the workpiece is provided with a lower inclined surface for grinding the upper edge of the workpiece and an upper inclined surface for grinding the lower edge of the workpiece, and a loading platform is provided at the front end of the machine base, and the loading platform includes a base, and a height-adjustable lifting platform is provided in the base, and a left and right position-adjustable translation seat is provided at the upper end of the lifting platform, and a front and rear distance-adjustable feeding plate is provided at the upper end of the translation seat, and a replaceable clamp is provided on the feeding plate.

2. A universal grinding machine according to claim 1, characterized in that: A protective cover is provided at the upper end of the machine base, and the side of the protective cover facing the feeding table is an open structure. A first oil cylinder for driving a pressure plate is provided at the upper end of the protective cover, and the bottom of the support table is connected to the machine base through a support plate, and a fixed seat and a movable seat for fixing the grinding mechanism are respectively provided on both sides of the support plate. A second oil cylinder and a fourth guide rail are provided at the upper end of the machine base, and the lower end of the movable seat cooperates with the fourth guide rail through a fourth slider, and the second oil cylinder pulls the movable seat to move horizontally, a positioning rod is provided on the side wall of the support plate, and a top frame is provided at the upper end of the movable seat, and the top frame cooperates with the positioning rod to clamp the workpiece.

3. A universal grinding machine according to claim 2, characterized in that: The upper ends of the movable seat and the fixed seat are both provided with a sixth guide rail and a third oil cylinder. The grinding mechanism also includes a bracket, the lower end of the bracket cooperates with the sixth guide rail through a sixth slider, the third oil cylinder pulls the bracket to move horizontally, a bracket is provided above the bracket, a fifth guide rail and a cylinder connected to the bracket are provided on the side wall of the bracket, one end of the bracket is connected to a side plate, the side plate cooperates with the fifth guide rail through the fifth slider, and the upper end of the bracket is provided with a support plate, one side of the support plate is provided with a pulley and a support wheel for supporting the grinding belt, and the other side of the support plate is provided with a third motor for driving the pulley.

4. The universal grinding machine according to claim 1, characterized in that: The lower end of the lifting platform is connected to the base through a screw lift, and a second guide rail is provided on the inner side wall of the base. Both ends of the lifting platform cooperate with the second guide rail through a second slider, and the upper end of the lifting platform is provided with a third guide rail, and a rack is provided on the side wall of the lifting platform. The lower end of the translation seat cooperates with the third guide rail through the third slider, and one end of the translation seat is connected to the second motor, and the output shaft of the second motor is provided with a gear meshing with the rack. The upper end of the translation seat is provided with a first guide rail and a first screw perpendicular to the third guide rail, and one end of the first screw is connected to the first motor, and the bottom of the feeding plate cooperates with the first guide rail through the first slider and cooperates with the first screw through a nut sleeve.

5. A universal grinding machine according to claim 4, characterized in that: The upper end of the feeding plate is provided with a positioning block and a quick clamp, the bottom of the clamp is connected to a mounting plate, one end of the mounting plate is provided with a positioning groove that cooperates with the positioning block, and the other end of the mounting plate is tightened and fixed by a quick clamp.

6. The universal grinding machine according to claim 1, characterized in that: The clamp comprises a first clamping jaw capable of clamping leftwards and rightwards and a second clamping jaw capable of clamping upwards and downwards.

7. A universal grinding machine according to claim 6, characterized in that: The second clamping jaw includes a shell, a front end of the shell is provided with a carrier plate that can move forward and backward, and an upper and lower clamping seat are provided on the side wall of the carrier plate, and the clamping seat is respectively connected with an upper claw and a lower claw through a rotating shaft, and the upper claw and the lower claw are respectively connected to the carrier plate through a second spring, and a fourth oil cylinder is provided in the shell, and the end of the piston rod of the fourth oil cylinder is connected to a push rod, which passes through the carrier plate and is located between the upper claw and the lower claw, and the push rod is connected to an upper push block for pushing the upper claw to close and a lower push block for pushing the lower claw to close through a push plate.

8. The universal grinding machine according to claim 7, characterized in that: The back of the carrier plate is connected with an upper guide plate and a lower guide plate which match the inner wall of the shell. The end of the lower guide plate is provided with a baffle, and the inner wall of the shell is provided with a limiting block which matches the baffle.

9. The universal grinding machine according to claim 8, characterized in that: The top end of the support frame is provided with a supporting column, and the two sides of the supporting column are respectively provided with a guide cylinder and a guide pin. The support column is connected to a rocker arm through a rotating shaft, and one end of the rocker arm is connected to the rocker column. A lock pin is slidably matched in the guide cylinder, and the rocker column passes through the lock pin and slides with the lock pin. The lower end of the lock pin can extend from the bottom of the lower guide plate. A pressing frame is provided on the back of the carrier plate, and a first spring is connected between the side wall of the pressing frame and the lower guide plate. The guide pin is inserted into the bottom of the pressing frame, and the pressing frame and the guide pin are slidably matched. The push rod and the rocker arm are both located in the pressing frame. The upper end of the push rod is provided with a retaining groove that matches the pressing frame, and one side of the retaining groove is provided with an inclined lifting surface. The upper inner wall of the frame is an inclined surface; when the second clamping jaw is in the initial state, the pressure frame cooperates with the baffle groove. When the piston rod of the fourth oil cylinder is extended, the push rod pushes the carrier plate forward through the pressure frame. When the baffle plate cooperates with the limit block, the push rod continues to move forward, and the lifting surface lifts the pressure frame. At this time, the lock pin drives the rocker arm to rotate under the action of gravity. The lower end of the lock pin extends from the bottom of the lower guide plate and cooperates with the end of the outer shell to fix the front and rear positions of the carrier plate. The push rod continues to move forward and drives the upper and lower jaws through the upper push blocks and the lower push blocks to realize the clamping action. When clamping, the lower jaw first flattens the plate workpiece, and then the upper jaw presses on the upper end of the plate workpiece to complete the clamping.

10. The universal grinding machine according to claim 7, characterized in that: The front end of the carrier plate is connected to a vertical positioning plate through a support block. The positioning plate is located between the upper claw and the lower claw and in front of the push plate.

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