Centering and locking device for movable workbench

Abstract

The utility model discloses a centering and locking device for a movable workbench, which is characterized in that the left side and the right side of the bottom of the movable workbench are respectively supported on linear guide rails through guide sliding seats, and V-shaped irons with outward openings are respectively embedded in the middle parts of the two side walls of the movable workbench; locking device bottom plates are fixed to the outer side of the track and the outer side of the machine body workbench respectively, square sinking grooves are formed in the upper surfaces of the locking device bottom plates, locking cylinder supports are embedded in the square sinking grooves, locking cylinders are fixed to the outer sides of the locking cylinder supports, and the free ends of piston rods of the locking cylinders are connected with the roots of locking cylinder bolts. The circumference of the locking cylinder bolt is located in the guide sleeve, the guide sleeve is fixed in the locking cylinder support, cutting faces are symmetrically arranged on the front side and the rear side of the end of the locking cylinder bolt to form a regular V-shaped head, and the regular V-shaped head is matched with a regular V-shaped notch of the V-shaped iron. According to the device, automatic alignment and centering of the movable workbench in the front-back direction can be achieved, the requirement for high-speed movement of the movable workbench can be met, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a hydraulic press with a movable workbench, in particular to a centering and locking device for the movable workbench, belonging to the technical field of hydraulic machine tools. Background Art

[0002] The hydraulic press with a movable worktable is located above the machine body worktable. When changing the mold, the movable worktable rises to a certain height and breaks contact with the machine body worktable. Then the in-and-out mechanism moves the movable worktable out horizontally. After changing the mold, the in-and-out mechanism moves the movable worktable in horizontally again. The clamping mechanism clamps the movable worktable on the machine body worktable and puts it back into operation. Each time the movable worktable moves in and out, it must repeat precise positioning to accurately fit the mold on the slider and cooperate with the loading action of the loading robot.

[0003] At present, the positioning and centering of the mobile workbench of the hydraulic press often adopts the structure of the combination of conical pins and conical sleeves. The countersunk holes are respectively processed on the upper surface of the workbench of the hydraulic press and the lower surface of the mobile workbench to install the positioning pins and positioning sleeves. The mobile workbench is driven by the reducer roller to enter the corresponding position of the fuselage. The roller contacts the top block position of the lifting cylinder, the lifting cylinder falls, and the mobile workbench falls by its own weight. The conical positioning pin and positioning sleeve are automatically aligned by the combination of the conical surface, and the positioning pin and positioning sleeve are set in pairs at opposite corners. This centering method requires the moving speed of the mobile workbench to be slow, and it needs to be decelerated in advance at the stop position and stopped by the dead stop iron. If the movement speed before stopping is too large, the mobile workbench will hit the dead stop iron to produce a large rebound displacement, which is easy to get out of the centering deviation of the positioning pin sleeve beyond the allowable range, resulting in interference. The mobile workbench cannot fall completely, and the working efficiency of this mechanism is low. Utility Model Content

[0004] The purpose of the utility model is to overcome the problems existing in the prior art and provide a mobile workbench centering and locking device, which can realize automatic alignment and centering of the mobile workbench in the front and rear directions, and can meet the requirements of high-speed movement of the mobile workbench along a linear guide rail, thereby improving work efficiency.

[0005] In order to solve the above technical problems, the utility model provides a mobile workbench centering and locking device, comprising a body workbench and a mobile workbench located above the body workbench, the left and right sides of the bottom of the mobile workbench are respectively supported on linear guide rails through guide slides, the front of the linear guide rails are supported on rails, the rear of the linear guide rails are embedded in a groove on the upper surface of the body workbench, and the middle of the two side walls of the mobile workbench are respectively embedded with V-shaped irons with openings facing outwards;

[0006] The outer sides of the rail and the fuselage workbench are respectively fixed with locking device bottom plates, the upper surface of the locking device bottom plate is provided with a square recessed groove, a locking cylinder support is embedded in the square recessed groove, a locking cylinder is fixed to the outer side of the locking cylinder support, the free end of the piston rod of the locking cylinder is connected to the root of the locking cylinder pin, the circumference of the locking cylinder pin is located in the guide sleeve, and the guide sleeve is fixed in the locking cylinder support, and the front and rear sides of the end of the locking cylinder pin are symmetrically provided with cutting surfaces to form a positive V-shaped head, and the positive V-shaped head matches the positive V-shaped notch of the V-shaped iron.

[0007] As an improvement of the present invention, the left and right sides of the locking cylinder support abut against the left and right edges of the square sink, and pairs of wedges are respectively provided between the front and rear sides of the locking cylinder support and the front and rear edges of the square sink.

[0008] As a further improvement of the utility model, a guide flat key is fixed on the locking cylinder latch, and the guide flat key is embedded in the long groove of the guide sleeve.

[0009] As a further improvement of the utility model, a sensing block is fixed on the locking cylinder pin, and the guide sleeve is also provided with a sensing block avoidance groove extending axially; a square recessed groove of the support is processed on the front or rear side of the locking cylinder support, a proximity switch mounting plate is fixed in the square recessed groove of the support, and a latch locking proximity switch and a latch unlocking proximity switch are respectively installed in the central long groove of the proximity switch mounting plate.

[0010] Compared with the prior art, the utility model has achieved the following beneficial effects: 1. The linear guide rail is used to realize the precise positioning of the movable workbench in the left and right directions, which can reduce the height of the movable workbench, increase the effective opening height of the hydraulic press, and increase the movement speed of the movable workbench to 500-600 mm / s, so as to save the period of each pressing cycle and improve production efficiency;

[0011] 2. It can realize the rapid centering of the mobile workbench in the front and back directions after it moves in and out, and is not affected by the floating of the mobile workbench in the height direction, with extremely high repeat positioning accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. The accompanying drawings are only provided for reference and explanation and are not intended to limit the present invention.

[0013] Figure 1 It is a top view of the centering and locking device of the mobile workbench of the utility model;

[0014] Figure 2 It is a cross-sectional view of the locking device of the movable platform in the utility model along the vertical longitudinal section;

[0015] Figure 3 It is a cross-sectional view of the locking device of the movable platform in the utility model along the horizontal cross section;

[0016] Figure 4 This is an end view of the locking device of the movable platform in the utility model;

[0017] In the figure: 1. Body workbench; 2. Column; 3. Connecting beam under column; 4. Moving workbench; 4a. V-shaped iron; 5. Rail; 6. Locking device bottom plate; 7. Locking cylinder support; 8. Locking cylinder; 8a. Locking cylinder piston rod; 8b. Plug chamber oil port; 8c. Rod chamber oil port; 9. Locking cylinder latch; 10. Guide flat key; 11. Guide sleeve; 12. Induction block; 13. Latch unlocking proximity switch; 14. Latch locking proximity switch; 15. Fixed wedge block; 16. Floating wedge block; 17. Lubricating oil cup; 18. Linear guide. DETAILED DESCRIPTION

[0018] In the following description of the utility model, the terms "upper", "lower", "front", "back", "left", "right", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the utility model and simplifying the description, and do not mean that the device must have a specific direction.

[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below with reference to specific illustrations.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0021] like Figures 1 to 4 As shown, the mobile workbench centering and locking device of the utility model includes a fuselage workbench 1 and a mobile workbench 4 located above the fuselage workbench 1, the left and right sides of the bottom of the mobile workbench 4 are respectively supported on a linear guide rail 18 through a guide slide, the front of the linear guide rail 18 is supported on the rail 5, the rear of the linear guide rail 18 is embedded in a groove on the upper surface of the fuselage workbench 1, and the middle of the two side walls of the mobile workbench 4 are respectively embedded with V-shaped irons 4a with openings facing outward.

[0022] The two sides of the machine body and the rail 5 are respectively installed with a pair of movable platform locking devices, which are used to lock the position of the movable platform 4 before and after it moves out, so as to ensure the repeated positioning accuracy of the movable platform 4 when it moves in and out.

[0023] The outer wall of the rail 5 is welded with a locking device bottom plate 6 at the position corresponding to the moving workbench 4 after it is moved out, and the moving platform locking devices are respectively installed on the locking device bottom plate 6. Two triangular ribs are welded below the locking device bottom plate 6, and the two triangular ribs are parallel to each other and the vertical sides are welded to the outer wall of the rail 5. The bottom of the locking cylinder support 7 is fixed to the locking device bottom plate 6 by screws.

[0024] A square groove is processed in the middle of the upper surface of the locking device bottom plate 6, and a pair of wedge blocks are respectively provided on the front and rear sides of the locking cylinder support 7. The locking cylinder support 7 and the wedge blocks on the front and rear sides are all located in the square groove.

[0025] The left and right widths of the square groove match the left and right widths of the locking cylinder support 7. The locking cylinder support 7 is embedded in the square groove of the locking device bottom plate 6. The left and right directions are limited and the position can only be adjusted in the front and back directions. The bottom of the fixed wedge 15 is against the front and back edge steps of the square groove to achieve the limit. A floating wedge 16 is inserted between the fixed wedge 15 and the locking cylinder support 7. The upper narrow and lower wide inclined surface of the fixed wedge 15 fits the upper wide and lower narrow inclined surface of the floating wedge 16. The screws are screwed into the locking device bottom plate 6 from top to bottom. By adjusting the insertion depth of the floating wedge 16, the position of the locking cylinder support 7 in the front and back directions can be fine-tuned. After the position of the locking cylinder support 7 in the front and back directions is accurately adjusted, the screws are screwed and locked.

[0026] The four corners of the machine body are provided with columns 2, and the lower parts of the columns 2 on the same side are connected to each other through the column lower connecting beam 3. The two sides of the machine body are also provided with moving table locking devices corresponding to the positions before the moving workbench 4 is moved out. The moving table locking devices are installed on the locking device bottom plate 6. The locking device bottom plate 6 is located in the square groove in the middle of the two column lower connecting beams 3. The corresponding locking cylinder support 7 and the wedges on the front and rear sides are also located in the square grooves on both sides of the machine body. The left and right sides of the locking cylinder support 7 are limited by the left and right edges of the square groove and form force support, and the position is fine-tuned along the front and rear directions.

[0027] The locking cylinder 8 is fixed to the outer wall of the locking cylinder support 7 through a flange, and the piston rod of the locking cylinder 8 extends toward the side wall of the movable workbench 4. The free end of the locking cylinder piston rod 8a is fixedly connected with a circular locking cylinder plug 9, which slides in a guide sleeve, and the guide sleeve 11 is installed in the locking cylinder support 7. A guide flat key 10 is fixed to the locking cylinder plug 9, and both sides of the guide flat key 10 are embedded in the long grooves of the guide sleeve 11 to ensure that the locking cylinder plug 9 is extended and retracted along the axial direction.

[0028] A lubricating oil cup 17 is provided on the top of the locking cylinder support 7 for injecting lubricating oil into the inner cavity of the guide sleeve 11 to reduce the resistance and wear of the locking cylinder latch 9 .

[0029] The front and rear sides of the free end of the locking cylinder pin 9 are provided with cutting surfaces to form a positive V-shaped head. The left and right side walls of the mobile workbench 4 are respectively fixed with V-shaped irons 4a. The middle of the V-shaped iron 4a is provided with a positive V-shaped notch opening outward, and the shape of the positive V-shaped notch matches the shape of the positive V-shaped head. After the mobile workbench 4 is moved into place, the locking cylinder 8 drives the locking cylinder pin 9 to extend, and the positive V-shaped head of the locking cylinder pin 9 is embedded in the positive V-shaped notch of the corresponding V-shaped iron 4a, so that the mobile workbench 4 can be automatically aligned in the front and rear directions, and the height direction is not interfered by the floating of the mobile workbench 4.

[0030] A square recess is machined on the front or rear side of the locking cylinder support 7, in which a proximity switch mounting plate is fixed. A latch locking proximity switch 14 and a latch unlocking proximity switch 13 are respectively installed in the central long groove of the proximity switch mounting plate, which are used to detect and send signals about the position of the locking cylinder latch 9.

[0031] A sensing block 12 is fixed to the side of the locking cylinder latch 9 facing the proximity switch mounting plate, and an escape groove for the translation of the sensing block 12 is also provided on the guide sleeve 11 along the length direction.

[0032] Oil enters the plug cavity oil port 8b of the locking cylinder 8, and after the locking cylinder pin 9 is inserted into the V-shaped iron 4a, the position of the sensor block 12 corresponds to the probe of the pin locking proximity switch 14, and the pin locking proximity switch 14 sends a locking signal to the control unit.

[0033] Oil enters the rod chamber oil port 8c of the locking cylinder 8. After the locking cylinder latch 9 is retracted, the position of the induction block 12 corresponds to the probe of the latch unlocking proximity switch 13, and the latch unlocking proximity switch 13 sends an unlocking signal to the control unit. The signal of the limit proximity switch forms an electrical interlock with the movement of the mobile workbench 4 and the movement of the slider. The mobile workbench 4 is not allowed to move before the locking cylinder latch 9 is withdrawn, otherwise the locking cylinder latch 9 will be damaged and the side of the mobile workbench will be scratched. The slider can be pressurized only after the locking cylinder latch 9 in the fuselage is tightened and the latch locking proximity switch 14 sends a signal.

[0034] The servo reducer drives the mobile workbench 4 to move at high speed, and decelerates in advance at the stop position. The moving position of the mobile workbench 4 can be calculated by the number of revolutions of the servo reducer, the reduction ratio of the reducer and the pitch circle radius of the driving gear, and its stop position can be controlled by the program. When the stop position is deviated, the positive V-shaped head of the locking cylinder pin 9 can be automatically aligned with the positive V-shaped notch installed on the side of the mobile workbench. The working pressure of the locking cylinder 8 can be adjusted by the overflow valve of the hydraulic system valve block.

[0035] The left and right sides of the locking cylinder support 7 are against the sides of the square groove to bear the thrust of the locking cylinder 8. The locking cylinder support 7 is connected to the contact surface of the square groove by screws, and the screw holes on the locking cylinder support 7 are long holes, which are convenient for fine-tuning the front and rear positions of the support. The front and rear positions of the locking cylinder support 7 are adjusted and fixed by wedges.

[0036] The mechanism is very convenient for adjusting the working position of the locking cylinder 8. Just slightly loosen the screws fixing the locking cylinder support 7 and the square groove, the locking cylinder pin 9 extends out, and the positive V-shaped head of the locking cylinder pin 9 cooperates with the V-shaped iron 4a installed on the left and right sides of the movable workbench, so as to generate lateral force in the front and rear directions on the locking cylinder support 7, and automatically adjust the locking cylinder support 7 to the position of two-to-two centering, and then tighten the connecting screws of the locking cylinder support 7 and the screws of the floating wedge block 16, etc.

[0037] Due to the limitation of the linear guide rail 18 and the guide slide, the movable workbench 4 cannot produce a displacement in the left and right directions, so there is only a position error in the front and back directions when the movable workbench 4 stops. The movable table locking device cleverly operates the V-type centering principle, has a simple, reliable and practical structure, is suitable for the centering and positioning of the movable workbench 4 moving at a high speed, and ensures the repeated positioning accuracy of the movable workbench 4.

[0038] The above description is only the preferred feasible embodiment of the utility model, which shows and describes the basic principle, main features and advantages of the utility model, but does not limit the scope of patent protection of the utility model. The technicians in this industry should understand that the utility model is not limited by the above embodiments. In addition to the above embodiments, the utility model can also have other implementation modes without departing from the spirit and scope of the utility model. The utility model will also have various changes and improvements. All technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the utility model. The scope of protection required by the utility model is defined by the attached claims and their equivalents. The technical features not described in the utility model can be achieved by or using existing technologies, which will not be repeated here.

Claims

1. A mobile workbench centering and locking device, comprising a body workbench and a mobile workbench located above the body workbench, characterized in that: The left and right sides of the bottom of the movable workbench are respectively supported on the linear guide rails through guide slides, the front part of the linear guide rails is supported on the rails, the rear part of the linear guide rails is embedded in the groove on the upper surface of the fuselage workbench, and the middle of the two side walls of the movable workbench are respectively embedded with V-shaped irons with openings facing outwards; The outer sides of the rail and the fuselage workbench are respectively fixed with locking device bottom plates, the upper surface of the locking device bottom plate is provided with a square recessed groove, a locking cylinder support is embedded in the square recessed groove, a locking cylinder is fixed to the outer side of the locking cylinder support, the free end of the piston rod of the locking cylinder is connected to the root of the locking cylinder pin, the circumference of the locking cylinder pin is located in the guide sleeve, and the guide sleeve is fixed in the locking cylinder support, and the front and rear sides of the end of the locking cylinder pin are symmetrically provided with cutting surfaces to form a positive V-shaped head, and the positive V-shaped head matches the positive V-shaped notch of the V-shaped iron.

2. The mobile workbench centering and locking device according to claim 1 is characterized in that: The left and right sides of the locking cylinder support are against the left and right edges of the square sink, and pairs of wedge blocks are respectively arranged between the front and rear sides of the locking cylinder support and the front and rear edges of the square sink.

3. The mobile workbench centering and locking device according to claim 1 is characterized in that: A guide flat key is fixed on the locking cylinder latch pin, and the guide flat key is embedded in the long groove of the guide sleeve.

4. The mobile workbench centering and locking device according to claim 1, 2 or 3, characterized in that: A sensing block is fixed on the locking cylinder pin, and the guide sleeve is also provided with a sensing block avoidance groove extending axially; a square recessed groove of the support is processed on the front or rear side of the locking cylinder support, a proximity switch mounting plate is fixed in the square recessed groove of the support, and a latch locking proximity switch and a latch unlocking proximity switch are respectively installed in the central long groove of the proximity switch mounting plate.

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