Burr-removing punching die

Abstract

The utility model discloses a deburring punching die which comprises a supporting mechanism, a punching mechanism and a material returning mechanism, the supporting mechanism comprises a bottom plate and a lower die, the top of the lower die is provided with a first counter bore and a first boss, the first counter bore is matched with a convex column of a half shaft support for positioning, and the first boss is matched with a weight reduction cavity of the half shaft support for positioning; the punching mechanism comprises a first cutter, a second cutter and a lifting assembly, the first cutter is provided with a punching groove, the punching groove is used for punching burrs on the peripheral edge of the half-shaft support, and the first cutter is used for punching burrs on the edge of an inner hole of the half-shaft support; the material returning mechanism comprises an upper die and an elastic reset assembly, the upper die and the punching groove are arranged in an up-down sliding mode, the elastic reset assembly is located between the lifting assembly and the upper die, and the elastic reset assembly resets to drive the upper die to downwards extrude the half-shaft support so that the half-shaft support can retreat from the punching groove. According to the deburring punching die, burrs can be removed in a punching mode, manual deburring operation is omitted, and deburring efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of punching dies, in particular to a burr removal punching die. Background Art

[0002] The half-axle bracket 100 is an automobile component, and a blank of the half-axle bracket 100 is formed by die-casting.

[0003] like Figure 1 Structurally, the bottom surface of the half-axle bracket 100 has a plurality of bosses 110 and a plurality of weight-reducing cavities 120, the bottom of the outer side wall of the half-axle bracket 100 has a lug 130, and the middle of the half-axle bracket 100 has an inner hole 140 that passes through from top to bottom.

[0004] During the production process, burrs remain on the edges of the four sides of the die-cast half-axle bracket 100 and the edges of the inner hole 140 , and the burrs on the edges of the four sides of the half-axle bracket 100 blank and the edges of the inner hole 140 need to be cleaned.

[0005] In the related art, the burrs on the four edges of the semi-axle bracket 100 blank and the edge of the inner hole 140 need to be removed by workers using files or grinding tools.

[0006] However, the existing method for deburring the semi-axle bracket 100 blank is inefficient. Utility Model Content

[0007] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a burr removal punching die, which can remove burrs by punching, eliminating the operation of manual burr removal and improving the efficiency of burr removal.

[0008] According to the first aspect of the utility model, a burr removal punching die comprises: a supporting mechanism, comprising a bottom plate, a lower die arranged on the bottom plate, the lower die being used to support the bottom surface of the half-axle bracket, the top of the lower die being provided with a first countersunk hole and a first boss, the first countersunk hole being positioned in cooperation with the convex column of the half-axle bracket, and the first boss being positioned in cooperation with the weight reduction cavity of the half-axle bracket; a punching mechanism, comprising a first tool, a second tool, and a lifting assembly for driving the first tool and the second tool to rise and fall, the first tool having a punching groove extending through from top to bottom, the shape of the punching groove being arranged corresponding to the shape of the four peripheral edges of the half-axle bracket, the punching groove being used to punch out burrs on the four peripheral edges of the half-axle bracket, and the first tool being used to punch out burrs on the edge of the inner hole of the half-axle bracket; a material withdrawal mechanism, comprising an upper die and an elastic reset assembly, the upper die and the punching groove being arranged to slide up and down, the elastic reset assembly being located between the lifting assembly and the upper die, the elastic reset assembly being reset to drive the upper die to press the half-axle bracket downward so that the half-axle bracket exits the punching groove.

[0009] A burr removal punching die according to an embodiment of the utility model has at least the following beneficial effects:

[0010] 1. The utility model provides a support mechanism, which includes a bottom plate and a lower die arranged on the bottom plate. The lower die is used to support the bottom surface of the half-axle bracket, thereby making the half-axle bracket more stable on the punching die.

[0011] 2. The utility model sets a first countersunk hole and a first boss on the top of the lower die. The first countersunk hole cooperates with the convex column of the half-axle bracket for positioning, and the first boss cooperates with the weight reduction cavity of the half-axle bracket for positioning. Thus, it is convenient for the lower die to position the placement of the half-axle bracket, so that the punching die can accurately punch and remove burrs on the half-axle bracket.

[0012] 3. The utility model sets a punching mechanism, which includes a first tool, a second tool and a lifting assembly that drives the first tool and the second tool to rise and fall. The first tool has a punching groove that passes through from top to bottom. The shape of the punching groove corresponds to the shape of the four edges of the semi-axle bracket. The punching groove is used to punch out burrs on the four edges of the semi-axle bracket. The first tool is used to punch out burrs on the inner hole edge of the semi-axle bracket. It can be understood that after the semi-axle bracket is placed on the lower die, the lifting assembly drives the first tool and the second tool to descend, so that the punching groove of the first tool can punch out burrs on the four edges of the semi-axle bracket, and the second tool can be inserted into the inner hole of the semi-axle bracket to punch out burrs on the inner hole edge of the semi-axle bracket. Thus, burrs are removed by punching, which eliminates the operation of manual burr removal and improves the efficiency of burr removal.

[0013] When the cutting mechanism completes the cutting and removing burrs, the lifting assembly drives the first tool to rise, and the elastic force of the elastic reset assembly drives the lower die to squeeze the half-shaft bracket up and down, so that the half-shaft bracket is downwardly disengaged from the groove of the first tool, avoiding the half-shaft bracket from being stuck in the groove, thereby making the cutting die return material smoother.

[0014] According to some embodiments of the utility model, the inner wall of the punching groove has a first slide groove extending upward, the side wall of the upper mold has a first pin, the first pin cooperates with the first slide groove to limit the position, and the bottom wall of the first slide groove is used to support the first pin.

[0015] According to some embodiments of the utility model, at least three first sliding grooves are provided, and at least three first sliding grooves are arranged circumferentially along the inner wall of the punching groove, and the first pins are provided correspondingly.

[0016] According to some embodiments of the utility model, the upper mold has an avoidance hole extending vertically through the upper mold, and the avoidance hole accommodates the passage of the second tool.

[0017] According to some embodiments of the utility model, the bottom surface of the upper mold is used to abut the top surface of the half-axle bracket, and a second boss is provided at the bottom of the upper mold, and the second boss is used to abut the lug of the half-axle bracket.

[0018] According to some embodiments of the utility model, the elastic reset assembly includes a material return rod and a first spring, the first spring is installed between the lifting assembly and the material return rod, and the first spring is used to drive the material return rod to squeeze the upper mold downward.

[0019] According to some embodiments of the utility model, there are several material return rods, and the elastic reset assembly also includes a mounting plate, and the mounting plate is arranged between the first spring and the material return rod, and several of the material return rods are installed at the bottom of the mounting plate.

[0020] According to some embodiments of the utility model, the lifting assembly includes a top plate, a first plate, and a first support connecting the top plate and the first plate, the first spring and the mounting plate are located between the top plate and the first plate, the top end of the first spring is connected to the bottom of the top plate, the bottom end of the first spring is connected to the mounting plate, the first plate supports the mounting plate, and the first plate has a first hole that passes through from top to bottom, and the first hole accommodates the passage of the material return rod.

[0021] According to some embodiments of the utility model, the lifting assembly also includes a second plate, the second plate is arranged at the bottom of the first plate, the second plate has a mounting hole that passes through from top to bottom, the mounting hole is used to install the second tool, the bottom surface of the first plate is abutted against the top surface of the second tool for limiting position, the second plate also has a second hole that passes through from top to bottom, the second hole accommodates the passage of the material return rod.

[0022] According to some embodiments of the utility model, the inner wall of the mounting hole is provided with a second slide groove extending upward, the side wall of the second tool has a second pin, the second pin cooperates with the second slide groove to limit the position, and the bottom wall of the second slide groove abuts against the second pin to limit the position.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0025] Figure 1 This is a schematic structural diagram of a half-axle bracket according to an embodiment of the utility model;

[0026] Figure 2 A schematic structural diagram of a burr removal punching die according to an embodiment of the utility model;

[0027] Figure 3 for Figure 2 An exploded view of the parts shown;

[0028] Figure 4 for Figure 2 A cross-sectional view is shown.

[0029] Figure markings: 100-semi-axle bracket, 110-boss, 120-weight reduction cavity, 130-boss, 140-inner hole, 150-bottom plate, 160-lower die, 170-first countersunk hole, 180-first boss, 190-first tool, 200-second tool, 210-lifting assembly, 220-groove, 230-upper die, 240-elastic reset assembly, 250-first slide groove, 260-first pin, 270-second boss, 280-return rod, 290-first spring, 300-mounting plate, 310-top plate, 320-first plate, 330-first support, 340-second plate, 350-mounting hole, 360-second slide groove, 370-second pin. DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0031] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] A deburring and punching die according to an embodiment of the utility model is described below in conjunction with the accompanying drawings.

[0035] Reference Figure 2 , Figure 3 and Figure 4 A burr removal punching die according to an embodiment of the utility model comprises a supporting mechanism, a punching mechanism and a material returning mechanism.

[0036] As for the supporting mechanism, the supporting mechanism includes a bottom plate 150 and a lower die 160 disposed on the bottom plate 150 . The lower die 160 is used to support the bottom surface of the half-axle bracket 100 , thereby making the half-axle bracket 100 more stable on the punching die.

[0037] Specifically, the top of the lower mold 160 has a first countersunk hole 170 and a first boss 180. The first countersunk hole 170 is positioned in cooperation with the boss 110 of the half-axle bracket 100, and the first boss 180 is positioned in cooperation with the weight-reducing cavity 120 of the half-axle bracket 100. This facilitates the lower mold 160 to position the placement of the half-axle bracket 100, so that the punching mold can accurately punch out and remove burrs on the half-axle bracket 100.

[0038] As for the punching mechanism, the punching mechanism includes a first tool 190, a second tool 200 and a lifting assembly 210 for driving the first tool 190 and the second tool 200 to rise and fall. The first tool 190 has a punching groove 220 that passes through from top to bottom. The shape of the punching groove 220 is set corresponding to the shape of the four peripheral edges of the half-axle bracket 100. The punching groove 220 is used to punch out burrs on the four peripheral edges of the half-axle bracket 100, and the first tool 190 is used to punch out burrs on the edge of the inner hole 140 of the half-axle bracket 100.

[0039] It can be understood that after the half-axle bracket 100 is placed on the lower mold 160, the lifting assembly 210 drives the first tool 190 and the second tool 200 to descend, so that the punching groove 220 of the first tool 190 can punch out the burrs on the four sides of the edge of the half-axle bracket 100, and the second tool 200 can be inserted into the inner hole 140 of the half-axle bracket 100 to punch out the burrs on the edge of the inner hole 140 of the half-axle bracket 100. In this way, the burrs are removed by punching, which eliminates the operation of manual burr removal and improves the efficiency of burr removal.

[0040] In some specific embodiments, the bottom plate 150 is provided with guide posts extending upward, and the bottom of the lifting assembly 210 is provided with guide holes extending upward. The guide posts and the guide holes cooperate to guide, thereby making the lifting of the lifting assembly 210 more stable.

[0041] As for the material return mechanism, the material return mechanism includes an upper mold 230 and an elastic reset assembly 240. The upper mold 230 and the slot 220 are set to slide up and down. The elastic reset assembly 240 is located between the lifting assembly 210 and the upper mold 230. The elastic reset assembly 240 resets and drives the upper mold 230 to squeeze the half-axle bracket 100 downward to make the half-axle bracket 100 withdraw from the slot 220.

[0042] It can be understood that when the lifting component 210 drives the first tool 190 to cut downward, the upper mold 230 descends with the first tool 190 and abuts against the top surface of the half-axle bracket 100 to press the half-axle bracket 100. After the upper mold 230 abuts against the half-axle bracket 100, the lifting component 210 continues to drive the first tool 190 to descend to punch the half-axle bracket 100, and the upper mold 230 is blocked by the half-axle bracket 100 and stops descending. At this time, the upper mold 230 and the lifting component cooperate to compress the elastic reset component 240. When the punching mechanism completes the punching and removing burrs, the lifting component 210 drives the first tool 190 to rise, and the elastic force of the elastic reset component 240 drives the lower mold 160 to squeeze the half-axle bracket 100 up and down, so that the half-axle bracket 100 is downwardly separated from the groove 220 of the first tool 190 to avoid the half-axle bracket 100 being stuck in the groove 220, thereby making the material withdrawal of the punching mold smoother.

[0043] In some specific embodiments, the inner wall of the punching groove 220 has a first slide groove 250 extending upward, and the side wall of the upper mold 230 has a first pin 260. The first pin 260 cooperates with the first slide groove 250 to limit the position, and the bottom wall of the first slide groove 250 is used to support the first pin 260. Therefore, the bottom wall of the first slide groove 250 cooperates with the first pin 260 to limit the upper mold 230 from downwardly disengaging from the first slide groove 250, thereby preventing the upper mold 230 from falling off. At the same time, the first slide groove 250 extends upward, so that the first pin 260 can slide up and down in the first slide groove 250, thereby enabling the upper mold 230 to move up and down relative to the first tool 190.

[0044] Furthermore, at least three first slide grooves 250 are arranged, and at least three first slide grooves 250 are arranged circumferentially along the inner wall of the punching groove 220, and the first pins 260 are arranged correspondingly, so that the coordinated support of the bottom walls of multiple first slide grooves 250 and the first pins 260 makes the upper mold 230 more stable.

[0045] In some specific embodiments, the upper mold 230 has an escape hole that passes through from top to bottom, and the escape hole accommodates the second tool 200 to pass through, thereby avoiding interference between the upper mold 230 and the second tool 200.

[0046] In some specific embodiments, the bottom surface of the upper mold 230 is used to abut the top surface of the half-axle bracket 100, and a second boss 270 is provided at the bottom of the upper mold 230, and the second boss 270 is used to abut the lug 130 of the half-axle bracket 100, so that the second boss 270 can support the lug 130, so that the supporting contact surface of the upper mold 230 on the half-axle bracket 100 is larger, and then, the force on the half-axle bracket 100 is more balanced.

[0047] In some specific embodiments, the elastic reset assembly 240 includes a material return rod 280 and a first spring 290. The first spring 290 is installed between the lifting assembly 210 and the material return rod 280. The first spring 290 is used to drive the material return rod 280 to press the upper mold 230 downward. Therefore, the first spring 290 will generate elastic force after being compressed and deformed. The elastic force generated by the first spring 290 restoring the deformation can squeeze the upper mold 230 to return the material. At the same time, the material return rod 280 can transfer motion between the first spring 290 and the upper mold 230. The material return rod 280 can avoid the lifting assembly 210, thereby reducing interference between the components of the punching mold.

[0048] In some specific embodiments, there are several return rods 280, and the elastic reset assembly 240 also includes a mounting plate 300, which is arranged between the first spring 290 and the return rod 280, and several return rods 280 are installed at the bottom of the mounting plate 300. Therefore, on the one hand, multiple return rods 280 are arranged to support the upper mold 230, so that the supporting force of the elastic reset assembly 240 on the upper mold 230 is more balanced. On the other hand, the first spring 290 can simultaneously drive the multiple return rods 280 through the mounting plate 300, so that the multiple return rods 280 move in unison, making the extrusion of the upper mold 230 by the multiple return rods 280 more stable.

[0049] In some specific embodiments, the lifting assembly 210 includes a top plate 310, a first plate 320, and a first support 330 connecting the top plate 310 and the first plate 320. The first spring 290 and the mounting plate 300 are located between the top plate 310 and the first plate 320. The top end of the first spring 290 is connected to the bottom of the top plate 310, and the bottom end of the first spring 290 is connected to the mounting plate 300. The first plate 320 supports the mounting plate 300, and the first plate 320 has a first hole that passes through from top to bottom, and the first hole accommodates the ejection rod 280 to pass through.

[0050] It can be understood that the top plate 310 and the first plate 320 are connected by the first support 330, so that there is a space between the top and the first plate 320 to accommodate the first spring 290 and the mounting plate 300, which is convenient for the arrangement of the first spring 290 and the mounting plate 300. At the same time, the first plate 320 can support and limit the mounting plate 300 to prevent the mounting plate 300 from falling.

[0051] In some specific embodiments, a plurality of first springs 290 are provided, and the plurality of first springs 290 are supported between the top plate 310 and the mounting plate 300 , so that the first springs 290 support the mounting plate 300 more stably.

[0052] In some specific embodiments, the lifting assembly 210 also includes a second plate 340, which is arranged at the bottom of the first plate 320. The second plate 340 has an installation hole 350 that passes through from top to bottom. The installation hole 350 is used to install the second tool 200. The bottom surface of the first plate 320 is abutted against the top surface of the second tool 200 for limiting. The second plate 340 also has a second hole that passes through from top to bottom. The second hole accommodates the ejection rod 280 to pass through, thereby facilitating the installation and fixation of the second tool 200 on the lifting assembly 210. At the same time, the first plate 320 can limit the ejection rod 280 from upwardly disengaging from the second slide groove 360.

[0053] In some specific embodiments, the inner wall of the mounting hole 350 is provided with a second slide groove 360 ​​extending upward, and the side wall of the second tool 200 has a second pin 370. The second pin 370 cooperates with the second slide groove 360 ​​to limit the position, and the bottom wall of the second slide groove 360 ​​abuts against the second pin 370 to limit the position, so that the bottom wall of the second slide groove 360 ​​and the second pin 370 cooperate to support the second tool 200 to prevent the second tool 200 from downwardly detaching from the lifting assembly 210.

[0054] In some specific embodiments, the lifting assembly 210 further includes a second support, and the second support is located between the second plate 340 and the first tool 190 , so that there is a movable space between the second plate 340 and the second tool 200 to accommodate the lifting and lowering of the upper mold 230 .

[0055] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0056] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A burr removal punching die, characterized in that: include: A support mechanism comprises a bottom plate (150) and a lower die (160) arranged on the bottom plate (150), wherein the lower die (160) is used to support the bottom surface of the semi-axle bracket (100), and the top of the lower die (160) has a first countersunk hole (170) and a first boss (180), wherein the first countersunk hole (170) cooperates with the boss (110) of the semi-axle bracket (100) for positioning, and the first boss (180) cooperates with the weight-reducing cavity (120) of the semi-axle bracket (100) for positioning; The punching mechanism comprises a first tool (190), a second tool (200) and a lifting assembly (210) for driving the first tool (190) and the second tool (200) to move up and down, wherein the first tool (190) has a punching groove (220) extending vertically, the shape of the punching groove (220) being arranged corresponding to the shape of the four peripheral edges of the semi-axle bracket (100), the punching groove (220) being used for punching burrs on the four peripheral edges of the semi-axle bracket (100), and the first tool (190) being used for punching burrs on the edge of the inner hole (140) of the semi-axle bracket (100); The material withdrawal mechanism comprises an upper die (230) and an elastic reset assembly (240); the upper die (230) and the punching groove (220) are arranged to slide up and down; the elastic reset assembly (240) is located between the lifting assembly (210) and the upper die (230); the elastic reset assembly (240) resets and drives the upper die (230) to press the semi-axle bracket (100) downward so that the semi-axle bracket (100) exits the punching groove (220).

2. A burr removal punching die according to claim 1, characterized in that: The inner wall of the punching groove (220) has a first slide groove (250) extending upward, and the side wall of the upper mold (230) has a first pin (260), the first pin (260) cooperates with the first slide groove (250) to limit the position, and the bottom wall of the first slide groove (250) is used to support the first pin (260).

3. A burr removal punching die according to claim 2, characterized in that: At least three of the first sliding grooves (250) are arranged, and the at least three first sliding grooves (250) are arranged circumferentially along the inner wall of the punching groove (220), and the first pins (260) are arranged correspondingly.

4. A burr removal punching die according to claim 1, characterized in that: The upper die (230) has an escape hole that passes through from top to bottom, and the escape hole accommodates the second tool (200) to pass through.

5. The burr removal punching die according to claim 1, characterized in that: The bottom surface of the upper mold (230) is used to abut against the top surface of the half-axle bracket (100), and a second boss (270) is provided at the bottom of the upper mold (230), and the second boss (270) is used to abut against the lug (130) of the half-axle bracket (100).

6. The burr removal punching die according to claim 1, characterized in that: The elastic reset assembly (240) comprises a material return rod (280) and a first spring (290), wherein the first spring (290) is installed between the lifting assembly (210) and the material return rod (280), and the first spring (290) is used to drive the material return rod (280) to press the upper mold (230) downward.

7. A burr removal punching die according to claim 6, characterized in that: There are a plurality of the material return rods (280), and the elastic reset assembly (240) further comprises a mounting plate (300), wherein the mounting plate (300) is arranged between the first spring (290) and the material return rod (280), and a plurality of the material return rods (280) are mounted at the bottom of the mounting plate (300).

8. The deburring punching die according to claim 7, characterized in that: The lifting assembly (210) includes a top plate (310), a first plate (320), and a first support (330) connecting the top plate (310) and the first plate (320); the first spring (290) and the mounting plate (300) are located between the top plate (310) and the first plate (320); the top end of the first spring (290) is connected to the bottom of the top plate (310); the bottom end of the first spring (290) is connected to the mounting plate (300); the first plate (320) supports the mounting plate (300); the first plate (320) has a first hole extending from top to bottom; the first hole accommodates the ejector rod (280) to pass through.

9. The deburring punching die according to claim 8, characterized in that: The lifting assembly (210) also includes a second plate (340), which is arranged at the bottom of the first plate (320), and the second plate (340) has a mounting hole (350) that passes through from top to bottom, and the mounting hole (350) is used to install the second tool (200). The bottom surface of the first plate (320) is abutted against the top surface of the second tool (200) for limiting position, and the second plate (340) also has a second hole that passes through from top to bottom, and the second hole accommodates the ejector rod (280) to pass through.

10. The deburring punching die according to claim 9, characterized in that: The inner wall of the mounting hole (350) is provided with a second sliding groove (360) extending upward, and the side of the second tool (200) is provided with a second sliding groove (360) extending upward. The wall has a second pin (370), and the second pin (370) cooperates with the second slide groove (360) to limit the position. The bottom wall of the second sliding groove (360) abuts against the second pin (370) to limit position.

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