Automobile model clamping device and clamping method

Abstract

The present invention discloses a car model clamping device and clamping method. The car model clamping device includes a base, which is provided with a positioning mechanism and multiple alignment mechanisms. The alignment mechanisms include a housing, a first slider, a second slider, a driving block, a first pressure block, a first transmission rod, and a second transmission rod. The housing is provided with a slider guide rail, the first slider and the second slider are assembled on the slider guide rail, the driving block is arranged in the housing, the first transmission rod is used to drive the driving block to move, and the driving block and the first slider and the second slider are matched with an inclined surface so that the first slider and the second slider are spread along the width direction of the workbench T-shaped slot and abut against the two side vertical surfaces of the workbench T-shaped slot. The first pressure block can be embedded in the workbench T-shaped slot in a first posture and can be rotated around the second transmission rod to a second posture after extending into the bottom of the workbench T-shaped slot to lock it in the workbench T-shaped slot. The device can quickly realize the alignment operation of the car model, reduce the difficulty of operation, and improve the accuracy and work efficiency.

Description

Technical Field

[0001] The invention is used in the field of automobile design, and particularly relates to an automobile model clamping device and a clamping method. Background Art

[0002] The automotive industry often needs to process car models, including hard wood models and soft clay models. When developing multiple models, the processing of different models is heavy. Even for models of the same model, the shape often changes before the review is confirmed, which involves reprocessing the existing processed models. Model processing requires the use of a 5-axis machining center, and each time processing, it is necessary to clamp and find the coordinates. When the design is changed for secondary processing, the current processing coordinate system needs to be set to coincide with the previous processing coordinate system. If there is a datum on the model, it is necessary to use a dial indicator to find the model datum that needs to be changed, and then set it to the programming software. If the model does not have a datum, the model cannot be reprocessed.

[0003] In the existing technology, when clamping a model, the operator lifts the model to be processed and places it on the fixture. Then, they operate the machining center to repeatedly adjust the model's position, align it, and find a reference to establish a coordinate system. During this alignment operation, the operator needs to find a straight edge or two points with identical coordinates in the model's X and Y directions, move a dial indicator to touch the straight edge or two points, and repeatedly adjust the model's position based on the dial indicator readings to align the model's X, Y, and Z directions with those of the machining equipment. This alignment method requires repeated straightening and adjusting angles with the dial indicator, which is time-consuming and lacks accuracy. Summary of the Invention

[0004] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art and to provide a car model clamping device and a clamping method, which can quickly realize the alignment operation of the car model, reduce the operation difficulty, and improve the accuracy and work efficiency.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] In the first aspect, a car model clamping device is used to clamp a car model to a workbench of a processing equipment. The car model clamping device includes a base, the base is provided with a positioning mechanism for cooperating with the car model and a plurality of alignment mechanisms for aligning the base and connecting it to the T-slot of the workbench. The alignment mechanism includes a shell, a first slider, a second slider, a driving block, a first pressure block, a first transmission rod and a second transmission rod. The shell is arranged at the bottom of the base and can be embedded in the T-slot of the workbench. The shell is provided with a slider guide extending along the width direction of the T-slot of the workbench. The first slider and the second slider are arranged along the width direction of the workbench. The width direction of the T-slot is assembled on the slider guide rail, and the driving block can be lifted and lowered on the shell. The first transmission rod is used to drive the driving block to move, and the driving block is matched with the first slider and the second slider using an inclined surface so that the first slider and the second slider are stretched along the width direction of the workbench T-slot and rest against the two side vertical surfaces of the workbench T-slot. The first pressure block is connected to the lower end of the second transmission rod. The first pressure block can be embedded in the workbench T-slot in a first posture, and can be rotated around the second transmission rod to a second posture after extending into the bottom of the workbench T-slot to lock it in the workbench T-slot.

[0007] In combination with the first aspect, in certain implementations of the first aspect, the first transmission rod includes an adjusting screw rod, a vertical screw hole is provided on the base, the adjusting screw rod is screwed into the vertical screw hole, and the lower end of the first transmission rod abuts against the driving block.

[0008] In combination with the first aspect and the above-mentioned implementation methods, in some implementation methods of the first aspect, the base is provided with a support pad supported above the adjusting screw, the adjusting screw is provided with a hollow inner hole, the second transmission rod includes a screw, the screw passes through the inner hole, the lower end of the screw is connected to the first pressure block below the shell, and the upper end of the screw is provided with a nut on the top of the support pad, and a floating space for the adjusting screw is formed between the support pad and the base, and a lateral force hole is provided on the top of the adjusting screw.

[0009] In combination with the first aspect and the above-mentioned implementation methods, in some implementation methods of the first aspect, the shell is provided with a hollow inner cavity, the first slider, the second slider and the driving block are arranged in the inner cavity, the top of the shell is provided with a cover plate, the shell is provided with a first opening for the first slider to extend along the slider guide rail and a second opening for the second slider to extend along the slider guide rail, the first slider is provided with a first inclined surface cooperating with the driving block and a first side end surface for supporting the side vertical surface of the T-slot of the workbench, the second slider is provided with a second inclined surface cooperating with the driving block and a second side end surface for supporting the side vertical surface of the T-slot of the workbench, and the driving block has a wedge surface cooperating with the first inclined surface and the second inclined surface.

[0010] In combination with the first aspect and the above-mentioned implementation manners, in some implementation manners of the first aspect, an elastic component for driving the first slider and the second slider to return to the inner cavity is provided in the housing.

[0011] In combination with the first aspect and the above-mentioned implementation methods, in some implementation methods of the first aspect, multiple alignment mechanisms are distributed in a straight line on the base, and multiple alignment mechanisms can be connected to a T-slot of the workbench. The base is provided with a third transmission rod, and the lower end of the third transmission rod is provided with a second pressure block. The second pressure block can be embedded in another T-slot of the workbench in a first posture, and can rotate around the third transmission rod to a second posture after extending into the bottom of the T-slot to lock the base to the workbench.

[0012] In combination with the first aspect and the above-mentioned implementation manner, in some implementation manners of the first aspect, the base is provided with a bracket for supporting the car model at a certain height, the positioning mechanism is arranged on the top of the bracket, the positioning mechanism includes a plurality of positioning components, the positioning components include a cylindrical pin extending along the height direction, the top end of the cylindrical pin is set as a spherical surface, a countersunk hole is provided on the spherical surface, a rolling ball seat is provided in the countersunk hole, a rolling ball is provided in the rolling ball seat, and a retaining spring sleeve is provided on the rolling ball seat to confine the rolling ball in the rolling ball seat, and the highest point of the rolling ball does not exceed the vertex of the complete outline of the spherical surface.

[0013] In combination with the first aspect and the above-mentioned implementation manner, in some implementation manners of the first aspect, a first fixing plate and a second fixing plate are provided at the top of the bracket along the length direction, a first support plate is provided at the top of the first fixing plate, the first support plate is installed on the first fixing plate by a first support guide rail extending along the length direction, a second support plate is provided at the top of the second fixing plate, the second support plate is installed on the second fixing plate by a second support guide rail extending along the length direction, the first support plate, the first support plate is provided with a first waist-shaped hole and a second waist-shaped hole extending in the direction of the first support guide rail, the second support plate is provided with a third waist-shaped hole and a fourth waist-shaped hole extending in the direction of the second support guide rail, the cylindrical pin includes a first cylindrical pin extending upward through the first waist-shaped hole and a second cylindrical pin extending upward through the third waist-shaped hole, the first support plate can adjust its position along the first support guide rail and be locked to the first fixing plate by a first fastener provided in the second waist-shaped hole, the second support plate can adjust its position along the second support guide rail and be locked to the second fixing plate by a second fastener provided in the fourth waist-shaped hole.

[0014] In combination with the first aspect and the above-mentioned implementation methods, in some implementation methods of the first aspect, the bracket is provided with a handwheel, the handwheel connects a coaxially arranged positive thread screw and a negative thread screw, the positive thread screw is in transmission cooperation with the first support plate, and the negative thread screw is in transmission cooperation with the second support plate.

[0015] In a second aspect, a method for clamping a car model comprises the following steps:

[0016] Prepare a car model clamping device as described in any of the above implementations;

[0017] Placing the car model clamping device on a workbench of a processing device, inserting a plurality of the alignment mechanisms into the T-slots of the workbench, adjusting the first transmission rod to drive the driving block to move, and driving the first and second sliders to spread out along the width direction of the T-slot of the workbench and press against the two side elevations of the T-slot of the workbench through the driving block, when the outer end surfaces of the first and second sliders of the plurality of alignment mechanisms are completely in contact with the side elevations of the T-slot of the workbench, the coordinate system direction of the car model clamping device is consistent with the coordinate system direction of the processing device;

[0018] Adjusting the second transmission rod so that the first pressing block is embedded in the T-slot of the workbench in a first posture, and after the first pressing block extends into the bottom of the T-slot of the workbench, rotating around the second transmission rod to a second posture, the first pressing block is placed horizontally in the T-slot of the workbench, and the car model clamping device is locked to the workbench;

[0019] The car model is placed on the car model clamping device, and the car model is positioned on the car model clamping device by cooperating with the positioning mechanism.

[0020] One of the above technical solutions has at least one of the following advantages or beneficial effects: the technical solution of the present invention can realize the rapid alignment of the car model on the workbench of the processing equipment. Specifically, during the operation, multiple alignment mechanisms are embedded in the T-slot of the workbench, and the first transmission rod is adjusted to drive the driving block to move. The driving block drives the first slider and the second slider to be stretched along the width direction of the workbench T-slot and to press against the two side vertical surfaces of the workbench T-slot. When the outer end surfaces of the first slider and the second slider of the multiple alignment mechanisms are completely aligned with the side vertical surfaces of the workbench T-slot, the coordinate system direction of the car model clamping device is consistent with the coordinate system direction of the processing equipment. The first pressure block is further locked to the T-slot of the workbench through the second transmission rod. At this time, the car model clamping device has been aligned. The technical solution of the present invention abandons the alignment method of repeatedly adjusting the dial indicator reading in the prior art. By setting an alignment mechanism to cooperate with the T-slot of the workbench, it can quickly realize the alignment operation of the car model, reduce the operation difficulty, and improve the accuracy and work efficiency.

[0021] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0023] Figure 1 This is a schematic structural diagram of an embodiment of the automobile model clamping device of the present invention;

[0024] Figure 2 yes Figure 1 A schematic structural diagram of an embodiment shown is installed on a workbench of a processing equipment;

[0025] Figure 3 yes Figure 2 A partial enlarged view of the middle part;

[0026] Figure 4 yes Figure 1 A schematic structural diagram of an alignment mechanism according to an embodiment is shown;

[0027] Figure 5 yes Figure 1 A schematic diagram of the connection structure between the alignment mechanism and the T-slot of the workbench according to an embodiment of the present invention is shown;

[0028] Figure 6 yes Figure 1 A schematic structural diagram of a positioning mechanism, a first support plate, and a second support plate according to an embodiment is shown;

[0029] Figure 7 yes Figure 6 A partial enlarged view of point B in the middle;

[0030] Figure 8 yes Figure 1 An exploded view of the positioning assembly structure of one embodiment is shown;

[0031] Figure 9 yes Figure 1 A schematic diagram of the positioning car model structure of an embodiment is shown. DETAILED DESCRIPTION

[0032] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it should not be understood as a limitation on the scope of protection of the present invention.

[0033] In the present invention, if directions (up, down, left, right, front and back) are described, it is only for the convenience of describing the technical solution of the present invention, and does not indicate or imply that the technical features referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as a limitation of the present invention.

[0034] In the present invention, "several" means one or more, "multiple" means more than two, "greater than," "less than," "exceeds," etc. are understood to exclude the number itself; "above," "below," "within," etc. are understood to include the number itself. In the description of the present invention, the use of "first" or "second" is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0035] In the present invention, unless otherwise expressly defined, terms such as "disposed," "installed," and "connected" should be interpreted broadly. For example, they may refer to direct connection or indirect connection through an intermediate medium; fixed connection or detachable connection or integral molding; mechanical connection or electrical connection or mutual communication; and internal connection between two components or interaction between two components. Those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0036] in, Figure 1 The reference direction coordinate system of the embodiment of the present invention is given below. Figure 1 The embodiment of the present invention is described with reference to the direction shown.

[0037] An embodiment of the present invention provides a car model clamping device for clamping a car model to a workbench of a processing equipment, and can quickly and accurately align the car model clamping device on the workbench of the processing equipment without the need for repeated adjustment using a dial indicator and then fixed locking.

[0038] See also Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5The car model clamping device includes a base 100, which is provided with a positioning mechanism for cooperating with the car model 200 and a plurality of alignment mechanisms for aligning the base 100 and connecting it to the T-slot 301 of the workbench. The alignment mechanism includes a shell 101, a first slider 102, a second slider 103, a driving block 104, a first pressure block 105, a first transmission rod 106 and a second transmission rod 107. The shell 101 is arranged at the bottom of the base 100 and can be embedded in the T-slot 301 of the workbench. The shell 101 is provided with a slider guide rail 108 extending along the width direction of the T-slot 301 of the workbench. The first slider 102 and the second slider 103 are assembled on the slider guide rail 108 along the width direction of the T-slot 301 of the workbench. The driving block 104 is arranged in the shell 101 so as to be able to be lifted and lowered. The first transmission rod 106 is used to drive the driving block 104 to move up and down. The first pressing block 105 is connected to the lower end of the second transmission rod 107, and the first pressing block 105 can be embedded in the workbench T-slot 301 in a first posture, and can be rotated around the second transmission rod 107 to a second posture after extending into the bottom of the workbench T-slot 301 to be locked in the workbench T-slot 301. For example, in some embodiments, the first pressing block 105 is in the shape of a rectangular parallelepiped, and the first pressing block 105 is longitudinally embedded in the T-slot. When the first pressing block 105 extends to the bottom of the T-slot, the second transmission rod 107 is rotated 90°. At this time, the long side of the first pressing block 105 is horizontal in the T-slot to achieve locking.

[0039] The technical solution of the present invention can realize the rapid alignment of the automobile model 200 on the workbench 300 of the processing equipment. Specifically, during the operation, multiple alignment mechanisms are embedded in the T-slot of the workbench 300, and the first transmission rod 106 is adjusted to drive the driving block 104 to move. The driving block 104 drives the first slider 102 and the second slider 103 to be spread out along the width direction of the workbench T-slot 301 and to press against the two side vertical surfaces 302 of the workbench T-slot 301. When the outer end surfaces of the first slider 102 and the second slider 103 of the multiple alignment mechanisms are aligned with the T-slot of the workbench, the alignment mechanism 200 is adjusted to the T-slot of the workbench. When the side elevation 302 of the groove 301 is completely in contact with each other, the coordinate system direction of the car model clamping device is consistent with the coordinate system direction of the processing equipment. The first pressure block 105 is further locked to the T-slot 301 of the workbench through the second transmission rod 107. At this time, the car model clamping device has been aligned. The technical solution of the present invention abandons the alignment method of repeatedly adjusting the dial indicator reading in the prior art. It sets an alignment mechanism to cooperate with the T-slot 301 of the workbench, which can quickly realize the alignment operation of the car model 200, reduce the difficulty of operation, and improve accuracy and work efficiency.

[0040] The first transmission rod 106 is used to drive the driving block 104 to move up and down in the housing 101. During the lifting process, the first slider 102 and the second slider 103 on both sides move along the slider guide rail 108 through the inclined surface to achieve the cooperation with the two side vertical surfaces 302 of the workbench T-slot 301. The first transmission rod 106 can be driven by levers, cams, cylinders, etc. In some embodiments, see Figure 4 、 Figure 5 The first transmission rod 106 includes an adjustment screw. The base 100 is provided with a vertical screw hole. The adjustment screw is screwed into the vertical screw hole. The lower end of the first transmission rod 106 abuts against the drive block 104. When the adjustment screw is rotated downward, the adjustment screw pushes the drive block 104 downward. The downward movement of the drive block 104 drives the first slider 102 and the second slider 103 to move to both sides along the slider guide rails 108. The adjustment screw is tightened to the tightest state. At this time, the outer end faces of the first slider 102 and the second slider 103 are completely aligned with the side elevation 302 of the T-slot. When all multiple alignment mechanisms are tightened, the car model clamping device is straightened as a whole, and the coordinate system direction is consistent with the machine tool coordinate system.

[0041] For further information, see Figure 3 、 Figure 4 、 Figure 5 The base 100 is provided with a support block 109 supported above the adjusting screw rod. The adjusting screw rod is provided with a hollow inner hole. The second transmission rod 107 includes a screw rod, which passes through the inner hole. The lower end of the screw rod is connected to the first pressure block 105 below the shell 101. The upper end of the screw rod is provided with a nut 110 on the top of the support block 109. A floating space for the adjusting screw rod is formed between the support block 109 and the base 100. A lateral force hole 111 is provided on the top of the adjusting screw rod. The adjusting screw rod can be rotated through the lateral force hole 111 to adjust the driving block 104. The adjusting screw is coaxially arranged with the screw rod. After the entire car model clamping device is straightened, the nut 110 is loosened and the screw rod is extended downward. When the first pressure block 105 reaches the bottom of the T-slot, the screw rod is rotated 90°. The long side of the first pressure block 105 is now positioned horizontally in the T-slot. The nut 110 is tightened, and the multiple alignment mechanisms are locked in sequence. The base 100 and the workbench 300 are now fixed, and the coordinates will not change due to collisions. In this embodiment, the alignment mechanism integrates the alignment and locking functions. The alignment and locking operations can be connected, but are independent and do not interfere with each other. The structural design is ingenious and convenient and practical.

[0042] In some embodiments, see Figure 4The shell 101 is provided with a hollow inner cavity, and the first slider 102, the second slider 103 and the driving block 104 are arranged in the inner cavity. A cover plate 112 is provided on the top of the shell 101, and the first transmission rod 106 passes through the cover plate 112 and abuts against the driving block 104. The shell 101 is provided with a first opening 113 for the first slider 102 to extend along the slider guide rail 108 and a second opening for the second slider 103 to extend along the slider guide rail 108. The first slider 102 is provided with a first inclined surface that cooperates with the driving block 104 and a first side end surface for abutting against the side vertical surface 302 of the T-shaped slot 301 of the workbench. The second slider 103 is provided with a second inclined surface that cooperates with the driving block 104 and a second side end surface for abutting against the side vertical surface 302 of the T-shaped slot 301 of the workbench. The driving block 104 has a wedge-shaped surface that cooperates with the first inclined surface and the second inclined surface.

[0043] For further information, see Figure 4 The housing 101 is provided with an elastic member 114 for driving the first and second sliders 102, 103 to return to their original positions in the inner cavity. When the first transmission rod 106 is loosened, the first and second sliders 102, 103 are automatically reset under the action of the elastic member 114, and the entire alignment mechanism can be smoothly removed from the workbench T-slot 301.

[0044] Multiple alignment mechanisms can be connected to one T-slot, or can be used to connect to multiple different T-slots. For example, in some embodiments, see Figure 1 、 Figure 2 、 Figure 5 Multiple alignment mechanisms are distributed along a straight line on the base 100, and each of these alignment mechanisms can be connected to a T-slot on the workbench 300. To ensure locking stability, the base 100 is provided with a third transmission rod 115, the lower end of which is provided with a second pressure block 116. The second pressure block 116 can be inserted into another T-slot on the workbench 300 in a first position. After reaching the bottom of the T-slot, it can rotate around the third transmission rod 115 to a second position to lock the base 100 to the workbench 300.

[0045] In some embodiments, see Figure 1 The base 100 is provided with a bracket 117 for supporting the car model 200 at a certain height, and a positioning mechanism is set on the top of the bracket 117. The car model 200 can be supported by the bracket 117 and positioned at a certain height through the positioning mechanism, so that the processing equipment can perform multi-directional processing on the car model 200.

[0046] The positioning mechanism includes a plurality of positioning components, which are used to cooperate with a plurality of positions on the bottom of the car model 200 to ensure that the car model 200 is positioned on the top of the bracket 117 in a specific posture.

[0047] The car model 200 is relatively heavy, and it is difficult to move the car model 200 on the fixture and to move the model to a specific location. Figure 6 、 Figure 7 、 Figure 8 The multiple positioning components have the same specifications and include a cylindrical pin 118 extending in the height direction. The cylindrical pin 118 is designed to engage with a pin hole on the bottom of the car model 200. The top of the cylindrical pin 118 is spherical, with a countersunk hole in the spherical surface. A ball seat 119 is located in the countersunk hole. A ball 120 is located in the ball seat 119. A retaining spring sleeve 121 is provided on the ball seat 119 to retain the ball 120 in the seat 119. The highest point of the ball 120 does not exceed the apex of the spherical contour. This ensures that when the car model 200 moves on the bracket 117, the bottom surface of the car model 200 makes point contact with the ball, while the ball rolls in the cylindrical sleeve, facilitating model movement and adjustment. The car model is moved until the cylindrical pin 118 engages a pre-defined circular hole in the base plate (for soft models) or the bottom of the car (for hard models). To facilitate the engagement of the car model with the cylindrical pin 118, a guide groove extending to the circular hole can be provided on the bottom of the car model. At the same time, the car model is fixed to the clamping device. At this time, the X\Y axis of the car model is consistent with the coordinate system direction of the clamping device. When the car model is clamped for the second time, the relative position of the car model and the clamping device is consistent with the last processing, which solves the problem of repeated positioning to find the original processing reference again, wasting time and poor precision.

[0048] In some embodiments, see Figure 1 、 Figure 6, a first fixing plate 122 and a second fixing plate 123 are provided on the top of the bracket 117 along the length direction, a first supporting plate 124 is provided on the top of the first fixing plate 122, the first supporting plate 124 is mounted on the first fixing plate 122 through a first supporting guide rail extending along the length direction, a second supporting plate 125 is provided on the top of the second fixing plate 123, the second supporting plate 125 is mounted on the second fixing plate 123 through a second supporting guide rail extending along the length direction, the first supporting plate 124, the first supporting plate 124 is provided with a first waist-shaped hole 126 and a second waist-shaped hole 127 extending along the direction of the first supporting guide rail, and the second supporting plate 1 25 is provided with a third waist-shaped hole 128 and a fourth waist-shaped hole 129 extending along the direction of the second support guide rail. The cylindrical pin 118 includes a first cylindrical pin 118 extending upward through the first waist-shaped hole 126 and a second cylindrical pin 118 extending upward through the third waist-shaped hole 128. The first support plate 124 can be adjusted along the first support guide rail and is locked to the first fixing plate 122 by a first fastener provided in the second waist-shaped hole 127. The second support plate 125 can be adjusted along the second support guide rail and is locked to the second fixing plate 123 by a second fastener provided in the fourth waist-shaped hole 129. The first cylindrical pin 118 and the second cylindrical pin 118 always remain unchanged when the first support plate 124 and the second support plate 125 are adjusted. When processing soft models, the material is soft and the torque of the machining tool is small, so the model or blank can be directly placed on the bracket 117 for processing. When processing hard models, the model is subjected to greater forces and its position may change during processing. It is necessary to adjust the first support plate 124 and the second support plate 125 to expose the four circular holes at the four corners of the first support plate 124 and the second support plate 125. Then, bolts are passed through the four circular holes to lock the model and the fixture from bottom to top before processing. This embodiment solves the problem of not sharing fixtures for processing hard and soft models and the inability to handle multiple models.

[0049] For the position adjustment of the first support plate 124 and the second support plate 125, a cylinder or manual adjustment can be used. For example, in some embodiments, see Figure 1 、 Figure 6The bracket 117 is provided with a handwheel 130, and the handwheel 130 connects the coaxially arranged positive thread screw 131 and the negative thread screw 132. The positive thread screw 131 is in transmission cooperation with the first support plate 124, and the negative thread screw 132 is in transmission cooperation with the second support plate 125. The positive thread screw 131 and the negative thread screw 132 are of equal length and can be rotated together when assembled together. When the size needs to be adjusted, loosen the bolts in the second waist-shaped hole 127 and the fourth waist-shaped hole 129 of the first support plate 124 and the second support plate 125, and turn the handwheel 130. The positive thread screw 131 and the negative thread screw 132 keep rotating in the same direction as the handwheel 130. Since the threads of the positive thread screw 131 and the negative thread screw 132 are opposite, the first support plate 124 and the second support plate 125 move outward relative to each other, thereby achieving the purpose of adjusting the size. First and second support rails are installed on the bottoms of the first and second support plates 124 and 125 and on the corresponding first and second fixing plates 122 and 123 to ensure the linear accuracy of the movement of the first and second support plates 124 and 125. When the adjustment is to the target position, the bolts in the waist holes are tightened to lock it, and the model or blank is installed.

[0050] See also Figure 1 、 Figure 2 、 Figure 9 , an embodiment of the present invention provides a car model clamping method, comprising the following steps:

[0051] Prepare a car model clamping device as in any of the above embodiments;

[0052] The car model clamping device is placed on the workbench 300 of the processing equipment, and multiple alignment mechanisms are embedded in the T-slot of the workbench 300. The first transmission rod 106 is adjusted to drive the driving block 104 to move. The driving block 104 drives the first slider 102 and the second slider 103 to be spread along the width direction of the workbench T-slot 301 and to abut against the two side vertical surfaces 302 of the workbench T-slot 301. When the outer end surfaces of the first slider 102 and the second slider 103 of the multiple alignment mechanisms are completely aligned with the side vertical surfaces 302 of the workbench T-slot 301, the coordinate system direction of the car model clamping device is consistent with the coordinate system direction of the processing equipment.

[0053] The second transmission rod 107 is adjusted so that the first pressing block 105 is inserted into the T-slot of the workbench 300 in a first posture. After the first pressing block 105 extends into the bottom of the T-slot 301 of the workbench, it is rotated around the second transmission rod 107 to a second posture. The first pressing block 105 is placed horizontally in the T-slot of the workbench 300, and the car model clamping device is locked to the workbench 300.

[0054] The car model 200 is placed on the car model clamping device, and the car model 200 is positioned on the car model clamping device by cooperating with the positioning mechanism.

[0055] In addition, an embodiment of the present invention further provides a repeated positioning method:

[0056] 1. Identify and activate a hole coordinate system on the processing equipment workbench 300, which is recorded as the origin N0 (X0, Y0, Z0);

[0057] 2. Place the entire clamping device on the workbench 300 of the machining center. Align the clamping device's locating holes with the holes identified in step 1. Insert the locating pins into the two aligned holes. The clamping device can now rotate along the axis of the locating pins.

[0058] 3. Remove the nut 110 and support block 109 of the alignment mechanism, and rotate the adjustment screw downward until it is fully tightened. At this time, the first slider 102 and the second slider 103 are completely in contact with the upper side of the T-slot;

[0059] Each alignment mechanism operates in the same manner;

[0060] Install the support block 109, place the screw down to the bottom of the T-slot, then rotate it 90°. Observe that the arrow mark on the top of the screw is perpendicular to the T-slot direction. Install the nut 110 and tighten it.

[0061] Each alignment mechanism operates in the same manner;

[0062] 4. Tighten the two second pressing blocks 116 on the clamping device. The clamping device is now aligned.

[0063] 5. When programming, reserve holes of the same specifications and arc grooves on the model or model base plate at the positions where the positioning components will fit together;

[0064] 6. Use the hand wheel 130 to adjust the size of the clamping device to the target size according to the size of the model;

[0065] 7. Hoist the model onto the clamping device and visually position it roughly in the programmed direction. Ensure that the bottom surface of the model or the bottom surface of the base plate contacts the rolling point of the positioning mechanism. Push the model along the width of the vehicle body from the front and rear ends. Stop when the arc-shaped groove on the bottom surface moves onto the positioning mechanism. The model's X / Y / Z directions are now parallel to those of the machining center.

[0066] 8. Push the model along its length. The design of the arc groove and the positioning mechanism allows the model to move linearly along the arc groove on the repeated positioning mechanism. When the reserved hole in step 5 coincides with the positioning mechanism, the model is inserted into the repeated positioning mechanism due to gravity and the guidance of the positioning mechanism, and the positioning is completed.

[0067] 9. Soft models are processed by directly converting the coordinate system; hard models are processed by installing bolts through the four circular holes, locking the model and the fixture, and then converting the coordinate system;

[0068] 10. Coordinate system conversion method:

[0069] The relative relationship between the model, clamping device and workbench 300 during programming is consistent with the actual clamping;

[0070] Select the origin N1 of the machining coordinate system. In the coordinate system of step 1, the coordinates of N1 are N1(X1, Y1, Z1). The distances that need to be transformed in the X / Y / Z axes during actual machining are:

[0071] X=X1-X0

[0072] Y=Y1-Y0

[0073] Z=Z1-Z0

[0074] Set the point (X1-X0, Y1-Y0, Z1-Z0) as the new coordinate origin N1, store it in the processing equipment and activate it;

[0075] After positioning is completed, the programming software exports the code and can be processed directly.

[0076] Throughout this specification, references to terms such as "example," "embodiment," or "some embodiments" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0077] Of course, the invention is not limited to the above-mentioned embodiments. Those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A car model clamping device for clamping a car model to a workbench of a processing equipment, characterized in that: The car model clamping device includes a base, the base is provided with a positioning mechanism for cooperating with the car model and a plurality of alignment mechanisms for aligning the base and connecting it to the T-slot of the workbench, the alignment mechanism includes a shell, a first slider, a second slider, a driving block, a first pressure block, a first transmission rod and a second transmission rod, the shell is arranged at the bottom of the base and can be embedded in the T-slot of the workbench, the shell is provided with a slider guide extending along the width direction of the T-slot of the workbench, the first slider and the second slider are assembled on the slider guide along the width direction of the T-slot of the workbench, the driving block can be lifted and lowered and is arranged on the shell, and the first transmission rod is used to drive the driving block to move The driving block cooperates with the first slider and the second slider with an inclined surface, so that the first slider and the second slider are stretched along the width direction of the T-shaped groove of the workbench and press against the two side vertical surfaces of the T-shaped groove of the workbench. The first pressure block is connected to the lower end of the second transmission rod. The first pressure block can be embedded in the T-shaped groove of the workbench in a first posture, and can be rotated around the second transmission rod to a second posture after extending into the bottom of the T-shaped groove of the workbench to lock it in the T-shaped groove of the workbench. The base is provided with a bracket for supporting the car model at a certain height. The positioning mechanism is arranged on the top of the bracket. The positioning mechanism includes a plurality of positioning components, and the positioning component includes a cylindrical component extending in the height direction. The pin, the top end of the cylindrical pin is set as a spherical surface, a countersunk hole is provided on the spherical surface, a ball seat is provided in the countersunk hole, a ball is provided in the ball seat, a retaining spring sleeve is provided on the ball seat to confine the ball in the ball seat, the highest point of the ball does not exceed the apex of the complete outline of the spherical surface, a first fixing plate and a second fixing plate are provided on the top of the bracket along the length direction, a first supporting plate is provided on the top of the first fixing plate, the first supporting plate is mounted on the first fixing plate by a first supporting guide rail extending along the length direction, a second supporting plate is provided on the top of the second fixing plate, the second supporting plate is mounted on the second fixing plate by a second supporting guide rail extending along the length direction, the first The support plate is provided with a first waist-shaped hole and a second waist-shaped hole extending along the direction of the first support guide rail, and the second support plate is provided with a third waist-shaped hole and a fourth waist-shaped hole extending along the direction of the second support guide rail. The cylindrical pin includes a first cylindrical pin extending upward through the first waist-shaped hole and a second cylindrical pin extending upward through the third waist-shaped hole. The first support plate can adjust its position along the first support guide rail and be locked to the first fixed plate by a first fastener set in the second waist-shaped hole. The second support plate can adjust its position along the second support guide rail and be locked to the second fixed plate by a second fastener set in the fourth waist-shaped hole.

2. The car model clamping device according to claim 1, characterized in that: The first transmission rod includes an adjusting screw rod. A vertical screw hole is provided on the base. The adjusting screw rod is screwed into the vertical screw hole. The lower end of the first transmission rod abuts against the driving block.

3. The automobile model clamping device according to claim 2, characterized in that: The base is provided with a support pad supported above the adjusting screw rod, the adjusting screw rod is provided with a hollow inner hole, the second transmission rod includes a screw rod, the screw rod passes through the inner hole, the lower end of the screw rod is connected to the first pressure block below the shell, and the upper end of the screw rod is provided with a nut on the top of the support pad block, and a floating space for the adjusting screw rod is formed between the support pad block and the base, and a lateral force hole is provided on the top of the adjusting screw rod.

4. The car model clamping device according to claim 1, characterized in that: The shell is provided with a hollow inner cavity, the first slider, the second slider and the driving block are arranged in the inner cavity, the top of the shell is provided with a cover plate, the shell is provided with a first opening for the first slider to extend along the slider guide rail and a second opening for the second slider to extend along the slider guide rail, the first slider is provided with a first inclined surface cooperating with the driving block and a first side end surface for supporting the side vertical surface of the T-shaped slot of the workbench, the second slider is provided with a second inclined surface cooperating with the driving block and a second side end surface for supporting the side vertical surface of the T-shaped slot of the workbench, and the driving block has a wedge surface cooperating with the first inclined surface and the second inclined surface.

5. The automobile model clamping device according to claim 4, characterized in that: The housing is provided with an elastic component for driving the first slider and the second slider to return to the inner cavity.

6. The automobile model clamping device according to claim 1, characterized in that: Multiple alignment mechanisms are distributed in a straight line on the base, and multiple alignment mechanisms can be connected to a T-slot of the workbench. The base is provided with a third transmission rod, and the lower end of the third transmission rod is provided with a second pressure block. The second pressure block can be embedded in another T-slot of the workbench in a first posture, and can rotate around the third transmission rod to a second posture after extending into the bottom of the T-slot to lock the base to the workbench.

7. The automobile model clamping device according to claim 1, characterized in that: The bracket is provided with a handwheel, which is connected to a coaxially arranged positive thread screw and a negative thread screw. The positive thread screw is in transmission cooperation with the first support plate, and the negative thread screw is in transmission cooperation with the second support plate.

8. A method for clamping a car model, characterized in that: The following steps are involved: Prepare a car model clamping device according to any one of claims 1 to 7; Placing the car model clamping device on a workbench of a processing device, inserting a plurality of the alignment mechanisms into the T-slots of the workbench, adjusting the first transmission rod to drive the driving block to move, and driving the first and second sliders to spread out along the width direction of the T-slot of the workbench and press against the two side elevations of the T-slot of the workbench through the driving block, when the outer end surfaces of the first and second sliders of the plurality of alignment mechanisms are completely in contact with the side elevations of the T-slot of the workbench, the coordinate system direction of the car model clamping device is consistent with the coordinate system direction of the processing device; Adjusting the second transmission rod so that the first pressing block is embedded in the T-slot of the workbench in a first posture, and after the first pressing block extends into the bottom of the T-slot of the workbench, rotating around the second transmission rod to a second posture, the first pressing block is placed horizontally in the T-slot of the workbench, and the car model clamping device is locked to the workbench; The car model is placed on the car model clamping device, and the car model is positioned on the car model clamping device by cooperating with the positioning mechanism.

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